(3x+2y-1)(3x-2y+1)-(x+y)(x-y)化简求值
化简求值(x+2y)^2-(2x+y)(2x-y)-5y(y-x) 其中 x=1/3 y= -1/2
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
化简求值{(x=2y)(5x-2y)-(3x+2y)(3x-2y)]/4x,其中x=2,y=-1
化简求值:(x+y)-(2x+1/2y)-(3x+1/6y)-(4x+1/12y)-(5x+1/20y)-.(10x+1
化简求值:[(3x-1\2y)^2+3y(x-y\12)]÷[(2x+y)^2-4y(x+1\4y)]
化简求值:(7x-2y)(3x-2y-1)-(4x+3y)(9x+6y),其中x=2,y=-1
化简求值:(x+y)+(2x+1/2y)+(3x+1/6y)+.+(9x+1/72y) ,其中x=1,y=-9
化简求值【(x+2Y)的平方-(x+Y)(3x-Y)-5y的平方】÷(2x),其中x=-2,y=2/1
因式分解(x^2+1)×(3x-2)+(2x-3)(1+x^2) 化简求值[2x^2+(x+y)(x-y)]×[(x+y
化简求值[4(x^2+y)(x^2-y)-(2x^2-y)^2]÷y其中x=2分之1,y=3
化简求值,要详细过程[(y-2x)(-2x-y)-4(x-2y)^2]÷3y,其中x=1,y=-2
化简求值,要详细过程[(y-2x)(-2x-y)-4(x-2y)²]÷3y,其中x=1,y=-3