Quadratic Equations Test

Result

Quadratic Equations Test - 9

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Question 1
1 / -0

A quadratic equation ax² + bx + c = 0 has real and distinct roots, if

A
b² − 4ac < 0

B
b² − 4ac > 0

C
b² − 4ac = 0

D
None of these

Solution

A quadratic equation ax² + bx + c = 0 has real and distinct roots, if b² − 4ac > 0.
Question 2
1 / -0

A quadratic equation ax² + bx + c = 0 has real and equal roots, if

A
b² − 4ac = 0

B
b² − 4ac < 0

C
b² − 4ac > 0

D
None of these

Solution

A quadratic equation ax² + bx + c = 0 has real and equal roots, if b² − 4ac = 0.
Question 3
1 / -0

A quadratic equation ax² + bx + c = 0 has non – real roots, if

A
b² − 4ac = 0

B
b² − 4ac < 0

C
b² − ac = 0

D
b² − 4ac > 0

Solution

The roots of the quadratic equation ax² + bx + c = 0, In this formula the term b²- 4ac is called the discriminant. If b² - 4ac = 0, so the equation has a single repeated root. If b² - 4ac > 0, the equation has two real roots. If b²- 4ac < 0, the equation has two complex roots.