plz solve the 13th problem
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(a+b)^3+(a-b)^3+6a(a^2-b^2)
=a^3+b^3+3a^2b+3ab^2+a^3-b^3-3a^2b+3ab^2+6a^3-6ab^2
we used identities here
=8a^3
remaining all terms cancelled
=a^3+b^3+3a^2b+3ab^2+a^3-b^3-3a^2b+3ab^2+6a^3-6ab^2
we used identities here
=8a^3
remaining all terms cancelled
jesdin:
nope i dnt think so
oh sry my bad
ur welcome
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