x^2+y^2+2x+2y-17=03x+8y+7=0错了
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x^2+y^2+2x+2y-17=03x+8y+7=0错了
x^2+y^2+2x+2y-17=0
3x+8y+7=0
错了
x^2+y^2+2x+2y-17=03x+8y+7=0错了
x=(-183+24√1371)/219,y=(-41-3√1371)/73
或x=(-183-24√1371)/219,y=(-41+3√1371)/73
x=3,y=-2
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
化简y(x+y)+(x+y)(x-y)-x^2
因式分解x(x+y)(x-y)-x(x+y)^2
(x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
填空:x-y/x+y=( )/x^2-y^2
(x-y)2•(y-x)³(x-y)=?
(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)
x^2(x-y)+(y-x)
x(x-y)2-(y-x)3
(x-4y)(2x+y)=
(x+y)(2x-3y)=?
x+y>=2,x-y
x+y>=2,x-y
y'-2y=(e^x)-x
y'+2y/x=x通解