﻿ NCERT Solutions CBSE Class 10 Maths Chapter 4 | Quadratic Equations

1. Introduction
3. Solution of a Quadratic Equation by Factorisation
4. Solution of a Quadratic Equation by Completing the Square
5. Nature of Roots
6. summary

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Comprehensive Study of the Chapter Quadratic Equation!

In maths, the quadratic equation is a polynomial equation which can be written in the following form: ax2+bx+c = 0, where x refers to a variable and a, b, c are constants and ‘a’ cannot be zero. The constants a, b, and c are called respectively the quadratic coefficient, the linear coefficient, and the constant term.

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In this course, we not only cover the important topics but also the NCERT Solutions CBSE Class 10 Maths Chapter 4 for your efficient learning.

1.  What do you mean by Quadratic and Roots?

It is a polynomial of degree 2. The term ‘quad’ means square as the variable gets the power of two like x2 whereas a real number ‘a’ is called a root of the quadratic equation, and they are also called zeroes of the polynomial.

2.  What are the forms of Quadratic function?

There are basically three types of forms named as General form, Vertex form, and Factored form. The general form is the most common one and the other two are used specifically. Vertex form is used in graphs and factored form includes a use of roots.

3.  What is Discriminant?

The expression of b2-4ac is called discriminant as it discriminates among the possible types of answer. It is denoted by D.

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1. Q.No 1 - During World War I Germany was defeated in the Battle of Verdun on the western front and Romania declared war on the eastern front in the year

1/10
2. Q.No 2 - Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?

7

10

12

13

2/10
3. Q.No 3 - Find the wrong number in the following series. 3252 , 3080 , 2958 , 2876 , 2826

3080

2876

2826

3252

None

3/10
4. Q.No 4 - The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?

0

1

10

19

None

4/10
5. Q.No 5 - Find the wrong number in the following series. 1250, 1322 , 1452, 1674, 2024 , 2544

1250

1674

2544

2024

None

5/10
6. Q.No 6 - A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?

10/21

11/21

2/7

5/7

None

6/10
7. Q.No 7 - In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the run rate in the remaining 40 overs to reach the target of 282 runs?

6.25

6.5

6.75

7

None

7/10
8. Q.No 8 - 5, 50, 45, 450, 445, ?, 4445

4450

4600

4550

4500

None of the above

8/10
9. Q.No 9 - Look carefully for the pattern, and then choose which pair of numbers comes next 42, 40, 38, 35, 33, 31, 28

25, 22

26,23

26, 24

26,22

None

9/10
10. Q.No 10 - Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?

1/3

1/8

2/8

1/16

None

10/10