解(x+1)(2x-3)+2(x+1)(3-2x)+(x+1)² (2x-3)
=(x+1)(2x-3)-2(x+1)(2x-3)+(x+1)² (2x-3)
= -(x+1)(2x-3)+(x+1)² (2x-3)
=(x+1)² (2x-3) -(x+1)(2x-3)
=(x+1)(2x-3)[(x+1)-1]
=(x+1)(2x-3)x
=x(x+1)(2x-3)
解(x+1)(2x-3)+2(x+1)(3-2x)+(x+1)² (2x-3)
=(x+1)(2x-3)-2(x+1)(2x-3)+(x+1)² (2x-3)
= -(x+1)(2x-3)+(x+1)² (2x-3)
=(x+1)² (2x-3) -(x+1)(2x-3)
=(x+1)(2x-3)[(x+1)-1]
=(x+1)(2x-3)x
=x(x+1)(2x-3)