Question

If ax2 + bx + c = 0 has equal roots, then c =
A. –b/2a
B.b/2a

C.-b²/4a

D.b²/4a

Answer 1

Answer:

D.b²/4a

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Answer 2

D. b²/4a

Step-by-step explanation:

Given ax² + bx + c = 0 has equal roots.

So discriminant is zero

d = b² - 4ac where a is the coefficient of x², b is the coefficient of x and c is the constant.

b² - 4ac = 0

b² = 4ac

c = b²/4a

Option D is the answer.