(2xy/x2-y2)+(x+y/x)-(y/y-x)计算
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(2xy/x2-y2)+(x+y/x)-(y/y-x)计算
(2xy/x2-y2)+(x+y/x)-(y/y-x)
计算
(2xy/x2-y2)+(x+y/x)-(y/y-x)计算
(2xy/x2-y2)+(x/x+y)-(y/y-x)
=(2xy+x²-xy+xy+y²)/(x+y)(x-y)
=(x+y)²/(x+y)(x-y)
=(x+y)/(x-y)
(x-y)(x2+xy+y2)
(x+y)(x2-xy+y2)
计算(x+y/x-y + 4xy/y2-x2)(x2-9y2)/(x2+2xy-3y2)
4x2-y2/x2-2xy+y2 +(2x-y)/2x2-2xy
x2-2xy+y2=4 x2+y2-x-y=6 解不等式x2-2xy+y2=4 x2+y2-x-y=6 解不等式
因式分解x2+y2-xy-x-y+1
x2-4y2-3xy+y+x
(x-y)(x2+xy+y2)-xy(y-x)
[2/xy/(1/x+1/y)2+(x2+y2)/(x2+2xy+y2)]*2x/(x-y)
已知x2+4y2+x2y2+1=6xy,则(x4-y4)/(2x2+xy-y2)*(2x-y)/(xy-y2)/(x2+y2/y)2=
因式分解x2-4xy+4y2+x-2y-2
x2-4xy+4y2-x+2y-2因式分解
x2+2xy-3y2+3x+y+2 因式分解
因式分解x2+2+y2-3x-2xy+3y
x2+2xy-8y2+2x+8y因式分解
(x2+y2)2与xy(x+y)2的大小
x2-xy-2y2-x+5y-2
(-x-2y)(x2-2xy+4y2)等于多少