Algebrahard · Past Paper
If the roots of ax^2 + bx + c = 0 are equal in magnitude but opposite in sign, then:
Aa = 0
Bb = 0
Cc = 0
Da = c
✓ Correct Answer: B — b = 0
Roots are α and -α. Sum = α + (-α) = 0. Since sum = -b/a, then -b/a = 0 → b = 0.
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