-5X²Y²+AX²Y²=6X²Y²
36x²y-48xy² y(x-y)²-(y-x)³ 3ax²+6ax
若4x²+y²-ax+10y+26=0,求6x-1/5y的值
(x-y)³+9(x-y)-6(x-y)²
(x+y)²+x+y-6因式分解
(x+y)²+4(x+y)-5
因式分解:x²(x-y)+(y-x)
使(ax²-2xy+y²)-(-ax²+bxy+2y²)=6x²-9x
ax^3y+axy^3-2ax²y² x²(x-y)+(y-x) 已知|3x+2y+3|+
2.(x+y)²(x-y)²-(x-y)(x+y)(x²+y²)
已知圆C1:x²+y²-2x-4y-12=0与圆C2:x²+y²-2ax-6y+
已知圆C:x²+y²-2x-4y-13=0与圆C2;x²+y²-2ax-6y+a
已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y