1.(x+1)(2x-3)-(x-1)(x+2)=x.x+71.(x+1)(2x-3)-(x-1)(x+2)=x.x+72.(2x+1)(4x.x-2x+1)-2x(4x.x+1)=03.(x-3)(x+2)=x.x-16
问题描述:
1.(x+1)(2x-3)-(x-1)(x+2)=x.x+7
1.(x+1)(2x-3)-(x-1)(x+2)=x.x+7
2.(2x+1)(4x.x-2x+1)-2x(4x.x+1)=0
3.(x-3)(x+2)=x.x-16
答