Question

15(a+2b) ^3(a-2b) ^2+20(a+2b) ^2(a-2b) ^3 factrise this
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Answer 1

Answer:

15(a+2b)^3(a-2b)^2+20(a+2b)^2(a-2b)^3

=5(a+2b)^2(a-2b)^2{3(a+2b)+4(a-2b)}

=5(a+2b)^2(a-2b)^2(3a+6b+4a-8b)

=5(a+2b)^2(a-2b)^2(7a-2b)