1.(3x²-2y)(-3x²-2y)=___ 2.2009²-2008*2010(简便)
2x²-3xy=y²=0(x,y不得o)求x/y+y/x
若函数y=x²+x与y=g(x)的图像关于点(-2,3)对称,则g(x)=___
(3x-y)²-2x(4x-5y)-(x+2y)²
先化简再求值:(x-2y)²-(x+2y)(x-2y)-(x-3y)(x-y).其中x²+9y
先化简,在求值:(x-y)²+(3x-2y)(2x+y)-x(6x-y)
(1)已知x+y=6,x²-y²=5,求x-y的值(2)若x+y=3,x²+y²
先化简再求值 :[(x+2y)²-(x+y)(3x-y)-5y²]÷(2x),其中x=—2,y=5
已知方程组2x-y=10,x+2y=11,求(2x-y)³-(2x-y)²(x-3y)的值
3(x-2y)²+(x-2y)因式分解
3m(x-y)-2(y-x)²因式分解
[(3x-2y)²-(3x+2y)(3x-2y)]/(2y-3y)
已知x²+|y+x|=x-1/4,求(3x+y)²(2x-y)²-(4x²+y&