把(x+y)²-(x+y)-6=0怎么分解成(x+y-3)(x+y-2)=0?
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
2x²-3xy=y²=0(x,y不得o)求x/y+y/x
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
分解因式:(x+y)3次方(x-y)-(x+y)(x-y)3次方
分解下列因式:x(y-x)+y(y-x)-(x-y)^2
分解因式的问题 把x方+xy-2y方+x+5y-2=0分解因式得到(x-y+2)(x+2y-1)=0 怎样分解的?
分解因式8(x²-2y²)-x(7x+y)+xy=
已知4x²+y²-4x-6y+10=0求(2/3x(√9x)+(y²√x/y³)
已知x-5y=0(y≠0),则代数式2x-3y/3x+6y
x²+y²-6x+8y+25=0求(x-y)-²