x+y=12 , 1xy=27 find x³+y³
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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
Shadowninja0075:
here it is
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