xy^2-2xy+2y-4
xy^2-2xy+2y-4
先化简,再求值 ⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1
(xy-x^2)乘以(xy)/(x-y)
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
已知x-y=4xy,则2x+3xy-2yx-2xy-y
因式分解xy²-2xy+2y-4
分解因式.xy²-2xy+2y-4
将xy^-2xy+2y-4因式分解
(-3x^y+2xy)-( )=4x^+xy
5xy^2-[3xy^2-(4xy^2-2x^y)]+x^2y-xy^2如何化简
x^2y+4xy+4y
-3(xy-2x²)-[y²-(5xy-4x²)+2xy]