2a(a-b)+4a(2a+3b)

问题描述:

2a(a-b)+4a(2a+3b)

=2a^2-2ab+8a^2+12ab
=10a^2+10ab
=10a(a+b)

2a(a-b)+4a(2a+3b)
=2a^2-2ab+8a^2+12ab
=10a^2+10ab
=10a(a+b)