Question

simplify (a+b)3-(a-b)3-6b(a2-b2)​

Answer 1

Answer:

(a+b)3-(a-b)3-6b(a2-b2)

=3a+3b-3a+3b-12ab+12b²

cut 3a by -3a

=3b+3b-12ab+12b²

=6b-12ab+12b²

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