If x² + px + q = (x + m)(x + n) and m + n = 10 mn = 21 then p + q equals?
- 31
- 32
- 33
- None of these
Explanation
(x + m)(x + n) = x² + (m + n)x + mn
So p = m + n = 10
q = mn = 21
p + q = 10 + 21 = 31
Last verified on 06-05-2026
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