2x^4y^2-3x^2y-5x^4y^2+x^2y-7xy^2 合并同类项
合并同类项:-3x+2y-5x-7y
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:6x^2y+2xy-3x^2y^2-7x-5yx-4y^2x^2-6x^2y
2x^4y^2-3x^2y-5x^4y^2+x^2y-7xy^2 合并同类项
3x+2y-5(x+y)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^2y+5xy^2-yx^2合并同类项
合并同类项 -3x²y+2x²y+3xy²-2xy²
3x+2y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)
1,5{2x-7y}-3{4x-10y} 2,{x-y}-[3x+{-x+y}] 去括号,合并同类项,
合并同类项(1)2x-3x-7x(2)2xy-3xy+5xy(3)5x^3y-6x-7x^3y-8x(4)2/3x^2-