if p+q=12, pq=22 find p^2+q^2
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the ans is in pic above
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ys15murthy:
i think it's wrong
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Answer:
p square + q square = (p+q) (p square + q square - pq)
= (12) {(p + q) whole square - 2(pq) - 22}
= (12) {(12) square - 2(22) - 22}
= (12) { 144 - 44 - 22 }
= (12) ( 144 - 66)
= 12 X 78
= 936
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