Question

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$( x + y)3 \: and \: (x - y )3$
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Answer 1

here is your answer mate....

(x+y)^3 = x^3 +y^2 +3xy(x+y)

and (x-y)^3 = x^3 -y^3 -3xy(x-y)

Answer 2

(x)^3 + (y)^3+3xy (x+y)

(x)^3-(y)^3-3xy (x-y)