-x=2y-8
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【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
12y(x-y)^2-8(x-y)^3=?
(x+2y)(x-2y)-(2y-x)(-2x-y)其中x=8,y=-8
[(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x=
已知X*X+Y*Y+6X-8Y+25=0 求(Y/X)+(X/Y)-2=?
x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y的值
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
已知x+y/y=11/8,求x-y/x+2y的值.
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian
[(2x-y)^2-y(y-4x)-8x]其中x=-1/2
9y=3x-(x-1),4(x+y)-(2x+4)=8y
已知x+y/x=11/8,求x-y/x+2y的值
3x-2y=9 x-3y=2 x+y=5 x+2y=3 y=x 2x+y=8
先化简在求值(x+2y)(x-2y)(2x-y)(-2x-y)其中x=8,y=-8-2x-y)qz
【x+_2y】[x-2y]-[2x-y][-2x-y]x=8 y=-8
x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x
若x-y=1 化简(x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)