因式分解5(2x-3)+4(3-2x)
问题描述:
因式分解5(2x-3)+4(3-2x)
两种解法,都说最好.
答
5(2x-3)+4(3-2x)
=5(2x-3)-4(2x-3)
=(2x-3)(5-4)
=2x-3
5(2x-3)+4(3-2x)
=-5(3-2x)+4(3-2x)
=(3-2x)(-5+4)
=-(3-2x)