Quadratic Equation Class 10 Notes

Quadratic Equation Class 10 Notes

Here you may find a comprehensive summary of the concepts studied in class 10 maths for quadratic equations. These quadratic equation notes aid students in remembering key terms, formulae, and methods for solving questions in the class 10 board exams. The principle of quadratic equations, standard form, the nature of roots, and techniques for solving the supplied quadratic equations, with additional examples, are covered in this article. To ensure that students taking the Class 10 exam are fully equipped with the resources and knowledge, scholars have worked tirelessly to develop important notes for the key concepts covered in the quadratic equations chapter.

Mathematics is challenging to learn despite its appeal since it takes time and effort. Students may use the Class 10 quadratic equation notes as a study resource to help prepare for class 10. After finishing one chapter, students may complete the exercises and determine their areas of weakness. They could concentrate on and improve their weak areas before the test.

Find all the information you need right here. These quadratic equations notes will help students recall the concepts and approaches necessary to solve the problems for the class 10 board exams. 

Overview of CBSE Class 10 Quadratic Equation Notes

The Quadratic Equation notes chapter is essential for dealing with numerous real-life circumstances as well as from the perspective of an exam. For instance, quadratic equations may be used to determine the length and width of a hall. The hall’s 300 square metres of carpeting plus the fact that its length is one metre longer than its width allow you to construct an equation.

More information on quadratic equations and how to determine their roots may be found in this chapter. Expert subject educators have prepared this Class 10 quadratic equation notes to help students with their overall board exam preparation. Because of this, the revision notes adhere to the NCERT standards to preserve correctness and a high level.

Class 10 quadratic equation notes have emphasised the relevant sub-topics within this chapter to make it easier for learners to memorise them easily. Detailed explanations of key ideas and terminologies are provided to promote greater understanding on your behalf.

The revision notes are provided in clear language to increase comprehension and facilitate faster learning. Go through these revision notes to help you understand your questions more clearly and improve your chances of getting excellent scores. Make the quadratic equation notes a part of your year-round study routine to score better.

CBSE Class 10 Quadratic Equation Notes

To assist you in effectively studying for the test, the Class 10 quadratic equation notes are broken down into the following subsections.

  • Roots of a Quadratic Equation 

You will study computing quadratic equations’ roots in this part. Remember that a quadratic equation in the variable x has the formula ax2 bx c = 0. Real numbers a, b, and c are present here. The Quadratic equations notes include an example-based explanation of it. You will discover why this quadratic equation’s standard form is referred to as such when you go over the notes. 

Based on the details provided in the question, the revision notes will assist you in reviewing how quadratic equations are utilised to describe real-life situations mathematically. You will also learn how to use practical methods to get the roots of quadratic equations in this portion of our Class 10 Mathematics quadratic equation notes. While computing the roots, you must remember that a root is a real integer that solves the quadratic equation and is not zero.

  • Solution by Factorisation of Quadratic Equations

Multiple approaches may be used to solve quadratic problems. In this lesson, you will learn how to factor quadratic equations to locate their roots. It would be beneficial if you were to keep in mind that splitting the middle term is necessary to factor quadratic polynomials. Additionally, remember that the equation must be factored into linear components to get the roots, and each factor must be equated to zero.

After determining the roots of the quadratic equation and solving it, you must confirm that these are the roots of the provided equation. You may review the approach appropriately by reading the revision notes. This approach is highly important; therefore, you should revise it frequently and consult the quadratic equation notes if you have any questions. Even better, you can use these notes for Class 10 Quadratic Equations as a PDF download to help you study for exams. You may memorise the notes’ detailed, step-by-step description of the factorisation procedure a day before your board examinations.

  • Methods of Square

This is another technique for figuring out the roots of a quadratic problem. The quadratic equation ax2 bx c = 0 is transformed using this approach into the form (x a)2 – b2 = 0. To answer this problem, you must now use your understanding of squares and square roots. As a result, this technique is also known as the “square-filling method.” The roots were discovered by obtaining the square roots of the words containing x, which are entirely contained inside a square.

These Class 10 quadratic equation notes include a detailed explanation of the above-mentioned technique with an example. An example of a quadratic equation is x2 4x. Using this technique, we can transform this to (x 2)2 – 4 = (x 2)2 – 22. You may also review your understanding of the quadratic formula under this section. To get the roots of a quadratic equation, apply this formula. You may easily find the roots of a quadratic problem using this technique. Therefore, keep practising this approach to improve your speed and accuracy. You may further your comprehension by consulting the Class 10 quadratic equation PDF.

  • Nature of Roots

A quadratic equation of the form ax2 bx c = 0 will be the subject of your education. This is analysed for you in Maths Class 10 quadratic equations notes. With the help of revision notes, you may understand the following easily.

ax2 bx c = 0 is a quadratic equation that has

  • Two real roots may be found if b2 – 4ac > 0.
  • If b2 – 4ac = 0, there are two equal real roots.
  • No real roots if b2 – 4ac=0.

You can know the nature of the roots if you have a firm understanding of this. To improve your comprehension of the fundamental ideas, go over the Quadratic Equations Class 10 Notes, compiled by professional mathematics tutors. Students may find all the information they want on the quadratic equation roots characteristics in the table below. Here is a description of the table.

If the discriminant’s value is 0, it signifies b2 – 4 ac = 0. The roots of the quadratic equation will be equal, which suggests that α = β = -b / 2a
If the discriminant’s value is < 0 or b2 – 4ac < 0 There will be imaginary roots in the quadratic equation. Specifically, we imply the values of α = (p iq) and β = (p – iq). Here ‘iq’ is a complex number’s imaginary part in this case.
When b2 – 4ac or the discriminant’s (D) value is greater than 0 Real roots for the quadratic equation will exist.
If D is also a perfect square and the discriminant’s value is greater than 0 Natural roots for the quadratic equation will exist.
If D is not a perfect square and the discriminant’s value is greater than 0 There will be irrational roots in the quadratic equation. As a result,  α = (p √q) and β = (p – √q)
If D is a perfect square and the discriminant exceeds 0. Additionally, a = 1, b and c are also integers The integral roots of the quadratic equation will exist.


  • Relationship between coefficients and roots of quadratic equations

While reading Class 10 Maths quadratic equations notes, it is crucial to comprehend the connection between the quadratic equations’ roots and their coefficients. Due to this, we shall discuss that particular subject straight away.

Assume that α and β are the roots of a quadratic equation. ax2 bx c = 0 is the quadratic equation in question. This implies:

  • α β = -b/a
  • αβ = c/a
  • α – β = ±√[(α β)2 – 4αβ]
  • |α β| = √D/|a|

Remember each of these equations. It is clear from these equations that if the supplied polynomials are simplified and the results are substituted, the connection between a polynomial equation’s roots and coefficients may be determined. These equations may be used to represent everything:

  • α2β β2α = αβ (α β) = – bc/a2
  • α2  αβ β2 = (α β)2 – αβ = (b2 – ac)/a2
  • α2  β2 = (α – β)2 – 2αβ
  • α2 – β2 = (α β) (α – β)
  • α3  β3 = (α β)3  3αβ(α β)
  • α3 – β3 = (α – β)3  3αβ(α – β)
  • (α/β)2  (β/α)2 = α4  β4/α2β2


  • Range of Quadratic Equations

These Maths quadratic equations notes of Class 10 now covered almost all of the key formulae and theorems relating to quadratic equations. Finding the range of quadratic equations is the only significant problem still open. Let’s discuss this subject.

Assume that f (x) = ax2 bx c is a quadratic expression. a is not equal to 0 in this equation. A, B, and C are real, too. Thus, the quadratic expression may be written as follows:

F(x) = ax2 bx c

Look at the examples discussed below.

  •         Case 1: When the quadratic equation’s two roots are greater than the value of m.

This occurs when: b2 – 4ac = (D) ≥ 0, -b / 2a > m, and f (m) > 0

  •         Case 2: When the quadratic expression’s two roots are less than the number “m.”

This happens when b2 – 4ac = (D) ≥ 0, -b / 2a < m, and f (m) > 0

  •         Case 3: If a quadratic equation’s two roots fall between a certain interval (m1, m2)

This is true when b2 – 4ac = (D) ≥ 0, m1 < -b / 2a > m2, f (m1) > 0, and f (m2) > 0

  •         Case 4: This occurs when a quadratic equation’s one root precisely falls between the interval of (m1, m2) and f. (m1). f (m2) < 0
  •         Case 5: If f (m) < 0, a given integer “m” will be found between the roots of a quadratic equation.
  •         Case 6: If f (0) < 0, the quadratic equation’s roots will have the opposite signs.
  •         Case 7: Both of the quadratic equations’ roots are positive

When b2 – 4ac = (D) ≥ 0, α β = -b / a > 0, and α x β = c / a > 0, this is true.

  •         Case 8: When a quadratic equation’s both roots are negative

When b2 – 4 ac = (D) ≥ 0, α β = -b / a < 0, and α x β = c / a < 0, this occurs.

Advice for Understanding Class 10 Quadratic Equations

Factorisation approach questions will be asked often; thus, you should educate yourself with this material. You must know the following items to solve a quadratic problem using the factorisation method:

  • Break the middle equation and find the values whose addition equals the coefficient of x and whose multiplication equals the product of a constant term and the coefficient of x2.
  • When zero is multiplied, either one or both results are zero.
  • Always carefully examine the equation and note the information that has to be obtained. The final solution can only include one variable.
  • You may create a relevant equation by using the Pythagoras theorem.
  • To prevent discrepancies in the result, enter the variables’ correct value when using the equation’s quadratic formula.