8x-3(y+2x)=?
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8x-3(y+2x)=?8x-3(y+2x)=?8x-3(y+2x)=?2x-3y5y-6x2X-3Y
8x-3(y+2x)=?
8x-3(y+2x)=?
8x-3(y+2x)=?
2x-3y
5y-6x
2X-3Y
若x-y不等于0,2x-3y=0,则分式(10x-11y)/(x-y)的值是()?(10x-11y)/(x-y) =[(8x-8y)+(2x-3y)]/(x-y) =8为什么8X-8Y=8?(10x-11y)/(x-y)=[(8x-8y)+(2x-3y)]/(x-y)=8+(2x-3y)]/(x-y)=8+0=8
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
12y(x-y)^2-8(x-y)^3=?
先化简,再求值 [2/3x - 2/x+y(x+y/3x -x-y)]*x/x-y,其中5x+3y=0
3x+y=2 -y/x+y=123x+y=2 (-y/x)+y=12
9y=3x-(x-1),4(x+y)-(2x+4)=8y
下列因式分解不正确的是?A.(x+3)²-1=(x+2)(x+4)B.-x^4+y²=(y+x²)(y-x²)C.2x²y-8y³=2y(x²-4y²)D.x^6-16x²=x²(x²+4)(x+2)(x-2)
解下列方程组或不等式组...一{ x(x-5)+y(y+6)=x平方+y平方-39 二 { x(x+7)-y(y-8)=x平方-y平方-11一{x(2x-5)大于2x平方-3x-4二{(x+1)(x-3)+8x大于(x+5)(x-5)-2
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2)/2(x-y)^2
2(x-y)²-3(x-y)(-y-x)
1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/(x^2-5x+6)+(x^2-3x+8)/(x^2-4x+3)2.{(x^2)/(x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{(x^2/x^2+y^2)^2}
化简求值8x的平方-5x(4y-x)+4x ×(-4x+5/2y)x=1 y=3
[(x-y)²+(x+y)(x-y)]/2xx=3,y=-1.5
3x-2y=9 x-3y=2 x+y=5 x+2y=3 y=x 2x+y=8
(-7x^2-8y^2)*(-x^2+3y^2) (3x-2y)(y-3x)-(2x-y)(3x+y)
x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x