1/3x +2/3y the whole cube
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nikki200414:
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If (a+b)^3= (a+b)(a^2+2ab+b^2) then,
=(1/3x+2/3y)(1/3x)^2+2(1/3x)(2/3y)+(2/3y)^2
=1/8x^3+1/2x^2y+2/3xy^2+8/27y^3
oh pls
i need to study one answer, i.e. the question just now i hv posted
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