Math, asked by goldrraksharam, 1 year ago

If 2x-5y=20 and xy=5 find the value of 8x cube-125 y cube

Answers

Answered by DakshP

1

Identity
(2x-5y)³=8x³-125y³+3(2x)(-5y)[2x-5y]
(20)³=8x³-125y³-30(5)[20]
8000=8x³-125y³-3000
11000=8x³-125y³

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