Question

$a{x}^2$+ bx + c = 0, where a, b, c are real, has real roots if:

• A. a, b, c are integers.
• B. $b^2$ > 3ac
• C. ac > 0 and b is zero
• D. c = 0

Answer 1

The correct option is D

c = 0

$a{x}^2$ + bx + c = 0

For real roots, $b^2$ – 4ac $\ge$ 0

If c = 0, $b^2$ $\ge$ 0

This is always true.