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If p12 and pa 27,find the value of p'+ |
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Answer» Given p + q = 12. On cubing both sides, we get (p + q)^3 = (12)^3 p^3 + q^3 + 3pq( p +q) = 1728 p^3 + q^3 + 3 * 27(12) = 1728 p^3 + q^3 + 972 = 1728 p^3 + q^3 = 1728 - 972 p^3 + q^3 = 756. |
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