合并同类项1/4x^2y-3x^2+3/4x^2y+2x^2
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y) 化简合并同类项
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
(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:- 2(x-y)的平方- 3(x-y)+5(y-x)的平方+4(y-x)
(1)3x-2y-5-4x+2分之一y+2分之一 合并同类项
合并同类项1/4x^2y-3x^2+3/4x^2y+2x^2
合并同类项 1/4x²y-3x²+3/4x²y+2x²
合并同类项 2x^2-3x^2+4x^2 5x-2y+3x+4y
1,5{2x-7y}-3{4x-10y} 2,{x-y}-[3x+{-x+y}] 去括号,合并同类项,
4x+2y-(3x-3y),先去掉括号,再合并同类项.