(-4x+1)(2x+3)-(-8x)(x+2)
问题描述:
(-4x+1)(2x+3)-(-8x)(x+2)
答
(-4x+1)(2x+3)-(-8x)(x+2)
=-8x^2-12x+2x+3+8x(x+2)
=-8x^2-12x+2x+3+8x^2+16x
=6x+3