expand (2 X + 3 y)cube
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(2x + 3y) =8x^2+18x^2y +18xy^2 +27y^3
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HEYA....
(2x + 3y) ^3
= (2x)^3 + (3y)^3 + 3*2x*3y(2x + 3y)
= 8x^3 + 27y^3 + 18xy(2x + 3y)
= 8x^3 + 27y^3 + 36x^2y + 54xy^2
(2x + 3y) ^3
= (2x)^3 + (3y)^3 + 3*2x*3y(2x + 3y)
= 8x^3 + 27y^3 + 18xy(2x + 3y)
= 8x^3 + 27y^3 + 36x^2y + 54xy^2
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