(a^2-2a)^2×b+2b×(a^2-2a)+b
问题描述:
(a^2-2a)^2×b+2b×(a^2-2a)+b
答
﹙a²-2a﹚²b+2b﹙a²-2a﹚+b
=b[﹙a²-2a﹚²+2﹙a²-2a﹚+1]
=b﹙a²-2a+1﹚²
=b﹙a-1﹚^4.