4x(2x^2-3x+1)计算5ax+7by+5ay+7bx因式分解_数学解答

4x(2x^2-3x+1)计算
5ax+7by+5ay+7bx因式分解

人气：277 ℃　时间：2020-02-06 01:03:33

解答

1、=4x×2x²-4x×3x+4x
=8x³-12x²+4x
2、=5ax+5ay+7by+7bx
=5a(x+y)+7b(x+y)
=(x+y)(5a+7b)