Algebramedium · Past Paper
The roots of x^2 + px + q = 0 are equal in magnitude but opposite in sign if:
Ap = 0
Bq = 0
Cp = q
Dp + q = 0
✓ Correct Answer: A — p = 0
Sum of roots = α + (-α) = 0. Since sum = -p, p must be 0.
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✓ Correct Answer: A — p = 0
Sum of roots = α + (-α) = 0. Since sum = -p, p must be 0.
Share this question