If 2x+3y=8 , x-y=2. Find the value of 8x^3+27y^3.
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2x+3y=13 xy=6
(2x+3y)3=133
8x3+27y3+3×4x2×3y+3×2x×9y2=133
8x3+27y3+18xy(2x+3y)=133
8x3+27y3+18(6)(13)=133
8x3+27y3=793
IT IS SIMILAR TO THIS JUST CHANGE VALUES
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