y^5x(y^5)^2一2x(y^5)^3
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
数学(x-y)^5*(y-x)^3*(x-y)^2
计算:(3x-y)2-(2x+y)2+5x(y-x)
(3x-y)²-2x(4x-5y)-(x+2y)²
((x+2y)x^2+(x-y)(3x-y)-5y^2)÷2x
化简求值(x+5y)(x+4y)-(x-y)(x+y),其中x=一又2/5,y=-1/7
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(2X-3y)-(5x-y)
-(5x+y)-3(2x-3y)(化简)
求解;一 (x-8y)(x-y) 二 (Y+2)(Y-2)-(Y-1)(Y+5) 三 (3X+4)(3X-4)-(2X+
一、 (x-y)^5÷(y-x)^2-(x-y) 二、 先化简,后求值 (2x-y)^13-[(2x-y)^3]-[(y