Algebraeasy · Past Paper

The roots of the equation x^2 + px + q = 0 are real and equal if:

Ap^2 = 4q
Bp^2 = q
Cq^2 = 4p
Dp = 4q

✓ Correct Answer: Ap^2 = 4q

D = p^2 - 4(1)(q) = 0 => p^2 = 4q.

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