2(x-2y)-6(x-2y)+3(x-2y)合并同类项
3x+2y合并同类项
合并同类项:-3x+2y-5x-7y
3x+2y-5(x+y)合并同类项
合并同类项:-6x²y-x+5x²y-2x+x³y+3x
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y) 化简合并同类项
合并同类项:- 2(x-y)的平方- 3(x-y)+5(y-x)的平方+4(y-x)
(x+y)和(x-y)各看成一个整体,合并同类项2(x+y)-3(x-y)²+3(x+y)+4(x-y)
合并同类项:6x^2y+2xy-3x^2y^2-7x-5yx-4y^2x^2-6x^2y
(1)3x-2y-5-4x+2分之一y+2分之一 合并同类项
先去括号再合并同类项 -3(x-y)+2(3x-2y)
合并同类项 -3x²y+2x²y+3xy²-2xy²
4x+2y-(3x-3y),先去掉括号,再合并同类项.