5(x-y)^2-(x-y)-8(x-y)^2-3(x-y)
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
数学(x-y)^5*(y-x)^3*(x-y)^2
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
(2X-3y)-(5x-y)
3x-2y=9 x-3y=2 x+y=5 x+2y=3 y=x 2x+y=8
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
[(x+2y)(x-2y)-(2x-y)^2+(3x-y))2x-5y)]/(-x)