Quadratic Equation Test

Result

Quadratic Equation Test - 6

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Weekly Quiz Competition

Question 1
1 / -0

The discriminant of the quadratic equation 3x² + 5x + 2 = 0 is _______.

A
0

B
1

C
2

D
none of these

Solution

D = b² - 4ac
= 25 - 4 X 3 X 2
= 25 - 24
= 1
Question 2
1 / -0

The discriminant of the quadratic equation x² + 4x + 4 = 0 is _______.

A
0

B
1

C
2

D
none of these

Solution

x² + 4x + 4 = 0
D = 16 - 4 x 1 x 4
= 16 - 16
= 0
Question 3
1 / -0

The roots of equation 2x² - 6 √2^" + 9 = 0 are _________.

A
not real

B
real unequal

C
real and equal

D
none of these

Solution

Finding b² - 4ac = 72 - 72 = 0. Hence, roots are real and equal.