Question

If x + y is equal to 12 x y is equal to 27 find x cube + y cube

Answer 1

Answer: hope it helps

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Step-by-step explanation:

Given (x + y) = 12 and xy = 27

Recall, x3 + y3 = (x + y)3 – 3xy(x + y)

⇒ x3 + y3 = (12)3 – 3(27)(12)

              = 1728 – 972

∴ x3 + y3 = 756