Question
If (p + q) = 12 and pq = 32, then find the value of (p²
+ q²).Solution
According to the question,
(p + q)² = 12²
⇒ p² + q² + 2pq = 144
⇒ p² + q² + 2(32) = 144
⇒ p² + q² + 64 = 144
⇒ p² + q² = 144 – 64 = 80
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