🏫 Board➗ Maths

Quadratic Equations

7 Board Maths previous year questions on Quadratic Equations — options free on every question; 1 include the answer & explanation free, the rest unlock with PYQ Pass.

Q1 FREE PREVIEW

Quadratic polynomial \(a{x}^{2}+bx+c\), the graph of found on graph paper -

a

straight line

b

parallel line

c

parabolas

d

curve line

✓ Correct answer: c)

parabolas

Explanation

The graph of quadratic equation is parabola

Q2

Derivative of given function w.r.t. the independent variable is

\(y=\frac{\sin x}{\cos x}\)

a

\(se{c}^{2}x\)

b

\(secx\)

c

\(se{c}^{2}2x\)

d

\(se{c}^{2}3x\)

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Q3

No real roots of quadratic equation \(a{x}^{2}+bx+c=0\), if

a

\({b}^{2}+4ac>0\)

b

\({b}^{2}-4ac=0\)

c

\({b}^{2}-4ac>0\)

d

\({b}^{2}-4ac<0\)

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Q4

If roots of the quadratic equation

\({x}^{2}−kx+4=0\)

are equal, find the value of \(k\)

a

\(\pm 1\)

b

\(\pm 2\)

c

\(\pm 3\)

d

\(\pm 4\)

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Q5

The discriminant value of the quadratic equation \(2{x}^{2}-4x+3=0\) will be

a

8

b

-8

c

40

d

16

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Q6

Discriminant of the quadratic equation \(3\sqrt{3}{x}^{2}+10x+3=0\) will be

a

8

b

30

c

46

d

64

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Q7

Choose the correct option and write :

Write the standard form of a quadratic equation.

a

\({a}^{2}x+bx+c=0\)

b

\(a{x}^{2}+bx+c\)

c

\(a{x}^{2}+bx+c=0\)

d

\({a}^{2}x+bx+{c}^{2}=0\)

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