y^5x(y^5)^2一2x(y^5)^3
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y^5x(y^5)^2一2x(y^5)^3
y^5x(y^5)^2一2x(y^5)^3
y^5x(y^5)^2一2x(y^5)^3
原式=(y^5)^3-2*(y^5)^3
=-(y^5)^3
=-y^15
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
y^5x(y^5)^2一2x(y^5)^3
化简求值(x+5y)(x+4y)-(x-y)(x+y),其中x=一又2/5,y=-1/7
化简求值(2X十y)(X一2y)一2x(X十y)其中x,y满足X^2十y^2一2X十4y=一5
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)请帮我一下写两道计算题[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以(4x)
多项式成多项式(一):(-4X-Y)(-5X+2Y)(二):(Y-1)(Y-2)(Y-3)(三):(2x+3y)(3x-2y)(四):(x+2)(x+3)-(x+6)(x-1)(五):(3x+2y)(2x+3y)-(x-3y)(3x+4y)
若x十y=6,x一y=5,则x^2一y^2=()
一(y+x)一(5x一2y)=?
分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2
.先化简再求值:(2x+y)(2x+y)-(2x-y)平方其中X,Y满足X平方+Y平方-2X+4Y+5=0
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值
(5)若x/2=y/3(y不为0)则x/y=____,x+y/y=___,y/x-y=___.
((x+2y)x^2+(x-y)(3x-y)-5y^2)÷2x
[(x+2y)²-(x-y)(x+2y)-5y²]÷(2y)
先化简,再求值 [2/3x - 2/x+y(x+y/3x -x-y)]*x/x-y,其中5x+3y=0
2x^2y×(-8y^2)+4x^2y×5y^2