chillimath.com

## Quadratic Equations Class 10 Multiple Choice Test

/10
2

Thank you for answering the multiple choice test

Challenge Yourself …

1 / 10

If the equation (a²+b²)x²−2(ac+bd)x+c²+d²=0 has equal roots, then:

(c) $$ad=\sqrt{bc}$$

(d) $$ab=\sqrt{cd}$$

2 / 10

If the roots of the equation (a²+b²)x²-2b(a+c)x+b²+c²=0 are equal, then:

(a) 2b = a + c

(b) b2 = ac

(c) $$b=\frac{2ac}{a+c}$$

(d) b = ac

3 / 10

If ½ is a root of the equation $$x^2+kx-\frac{5}{4}=0$$, then the value of k is:

(a) 2

(b)  – 2

(c) $$\frac{1}{4}$$

(d) $$\frac{1}{2}$$

4 / 10

Which of the following is a quadratic equation?

(a) $$x^2+2x+1=(4-x)^2+3$$

(b) $$-2x^2=(5-x)(2x-\frac{2}{5})$$

(c) $$(k+1)x^2+\frac{3}{2}x=7$$, where k=−1

(d) $$x^3-x^2=(x-1)^3$$

5 / 10

If the equation x2 + 4x + k = 0 has real and distinct roots, then:

(a) k < 4

(b)  k > 4

(c) k > 4

(d)  k < 4

6 / 10

If ax2 + bx + c = 0 has equal roots, then c is equal to:

(a) $$-\frac{b}{2a}$$

(b) $$\frac{b}{2a}$$

(c) $$-\frac{b^2}{4a}$$

(d) $$\frac{b^2}{4a}$$

7 / 10

Which of the following is a root of the equation 2x2 – 5x – 3 = 0?

(a) x = 3

(b) x = 4

(c) x = 1

(d) x = –3

8 / 10

If x = 2 is a root of the equation 3x2 – 2kx + 5 = 0, then k is equal to:

(a) $$\frac{4}{17}$$

(b) $$\frac{17}{4}$$

(c) $$\frac{1}{17}$$

(d) $$\frac{1}{4}$$

9 / 10

x=√2 is a solution of the equation:

(a) x²+√2 x−4=0

(b) x²−√2 x−4=0

(c) 3x2 + 5x + 2 = 0

(d) (a) and (b) both

10 / 10

If one root of the equation 2x²−10x+p=0 is 2, then the value of p is:

(a) −3

(b) −6

(c) 9

(d) 12