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The roots of the equation x2 + px + q = 0 are equal if :
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- p2 = 2q
- p2 = 4q
- p2 = - 4q
- p2 = - 2q
Correct Option: B
On comparing it with ax2 + bx + c = 0 , we get a = 1, b = p, c = q
The roots of the equation x2 + px + q = 0 are equal if
b2 - 4ac = 0
⇒ p2 - 4q = 0 ⇒ p2 = 4q.
Thus , required answer is option B .
