问题
解答题
分解因式:(1)-4a2x+12ax-9x (2) (2x+y)2-(x+2y)2.
答案
(1)原式=-x(4a2-12a+9)
=-x(2a-3)2;
(2)原式=(2x+y+x+2y)(2x+y-x-2y)
=(3x+3y)(x-y)
=3(x+y)(x-y).
分解因式:(1)-4a2x+12ax-9x (2) (2x+y)2-(x+2y)2.
(1)原式=-x(4a2-12a+9)
=-x(2a-3)2;
(2)原式=(2x+y+x+2y)(2x+y-x-2y)
=(3x+3y)(x-y)
=3(x+y)(x-y).