作业帮化简4(x-2y)^2-3[(x-2y)^2+2(x+y)]+2x+2y
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/14 03:58:30
![化简4(x-2y)^2-3[(x-2y)^2+2(x+y)]+2x+2y](/uploads/image/z/290427-51-7.jpg?t=%E5%8C%96%E7%AE%804%28x-2y%29%5E2-3%5B%28x-2y%29%5E2%2B2%28x%2By%29%5D%2B2x%2B2y)
化简4(x-2y)^2-3[(x-2y)^2+2(x+y)]+2x+2y
化简4(x-2y)^2-3[(x-2y)^2+2(x+y)]+2x+2y
化简4(x-2y)^2-3[(x-2y)^2+2(x+y)]+2x+2y
4(x-2y)²-3[(x-2y)²+2(x+y)]+2x+2y
=4(x-2y)²-3(x-2y)²-6(x+y)+2(x+y)
=(x-2y)²-4(x+y)
=x²+4y²-4xy-4x-4y