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Factorise of (x - y)³+8(x + y)³.can anyone do this ..... |
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Answer» -STEP explanation:so here we have (X -y)^3 + 8(x+y)^3now 8 (x+y)^3 can be WRITTEN as = [2 (x+y)]^3now we have(x-y)^3 + [2 (x+y)]^3IN this identity of a^3 +b^3 = (a+b) ( a^2 - ab + b^2) so .(x-y)^3 + [2(x+y)][(x-y) + 2(x+y)] [ (x-y)^2 -2(x+y)(x-y) +(2x+2y) ^2][3X + y] [ 5x^2 +5y^2 -2x^2 +2y^2 + 6xy][3x +y ] [ 7y^2 +3x^2+ 6xy]Thankyou |
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