一道初一合并同类项题 2x²y-2y²x+2xy²+2yx²
一道初一合并同类项题 2x²y-2y²x+2xy²+2yx²
x²-3xy-3x²y²+2yx²-y²x 合并同类项
-x^2y+5xy^2-yx^2合并同类项
7x²y-2xy²+2yx²+y²x-3xy²怎么做?是合并同类项在算
合并同类项 -3x²y+2x²y+3xy²-2xy²
合并同类项:(2xy²+3xy²)-(6x²y-3xy²)
合并同类项:x²y²-1/3xy²+1/2xy²+2/3x²y
合并同类项:6x^2y+2xy-3x^2y^2-7x-5yx-4y^2x^2-6x^2y
3xy+xy+2x²y+yx²+3x²y等于多少
x^3—2x^2y—y^2x+yx^2+2xy^2—y^3合并同类项
先去括号,再合并同类项:3x²y-[2xy²-2(xy-2/3x²y)+xy]+3xy
合并同类项题目先化简,再求值2XY+3YX^2+6XY-6X^Y其中X=1/2 Y=-4