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Find x^3 – y^3, if x – y = 5 and xy = 14.

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Find x3 – y3, if x – y = 5 and xy = 14.

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1 Answer

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Best answer

x – y = 5, xy = 14 

x3 – y3 = (x – y)3 + 3xy (x – y) = 53 + 3 x 14 x 5 

= 125 + 210 = 335

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