Answered

removal of a common factor
like (72(a+b)^2-48(a+b)^3

Sagot :

Jers15id
72a²+144ab+72b²-48(a²+2ab+b²)(a+b)
72a²+144ab+72b²-48(a³+2a²b+ab²+a²b+2ab²+b³)
72a²+144ab+72b²-48a³-96a²b-48ab²-48a²b-96ab²-48b³

Hope this helps =)