25(x+y)^2+16(x-y)^2=4y(y-x)^2-6y(x-y)^3=(a-2b)^2+(a-2b)+1/4=
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x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
(12-2x)/X=(-16-2Y)/Y X^2+Y^2=25 Y
已知x^2+y^2-16x-8y+25=0,求y/x-x/y的值
已知X*X+Y*Y+6X-8Y+25=0 求(Y/X)+(X/Y)-2=?
(x+y)^2-z^=a^2-(b-c)^2=(x-y)^3-x+y=16(x+y)^2-25(x-y)^2=
填空:x-y/x+y=( )/x^2-y^2
(x-y)2•(y-x)³(x-y)=?
y+y'-2y=2x
微分方程y - 2y' + y = x
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
(x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
化简y(x+y)+(x+y)(x-y)-x^2
(x+y)^2-16(x-y)^2
(x+y)^2-16(x-y)^2
16-8(x-y)+(x-y)2
(x-4y)(2x+y)=
(x+y)(2x-3y)=?