1/4a^2b^2(3ab(a+b)-5a(ab-b^2))

问题描述:

1/4a^2b^2(3ab(a+b)-5a(ab-b^2))
1/4a^2b^2(3ab(a+b)-5a(ab-b^2))=?

1/4a^2b^2(3ab(a+b)-5a(ab-b^2))
=1/4a^2b^2(3ab(a+b)-5ab(a-b))
=1/4a^2b^2(ab(3a+3b-5a+5b))
=1/2a^3b^3(4b-a)