2x的2次方+4xy-6ax+3a-x-2y 因式分解

题目

2x的2次方+4xy-6ax+3a-x-2y 因式分解

答案

2x的2次方+4xy-6ax+3a-x-2y
＝（2x^2-x）+(4xy-2y)-(6ax-3a)
=2x(2x-1)+2y(2x-1)-6a(2x-1)
=(2x+2y-6a)(2x-1)
=2(x+y-3a)(2x-1)