x²+(-2x-3y+1) (3x-2y)-2(3x-4y) 这两题怎么化简
x²+(-2x-3y+1) (3x-2y)-2(3x-4y) 这两题怎么化简
(3x-y)²-2x(4x-5y)-(x+2y)²
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y) 化简合并同类项
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
先化简再求值:(x-2y)²-(x+2y)(x-2y)-(x-3y)(x-y).其中x²+9y
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
已知x²+|y+x|=x-1/4,求(3x+y)²(2x-y)²-(4x²+y&
该怎么画出y=2(x+2)²+1,y=- 3/4(x-3)²+2.y=x²-x-2,y=-
(x-y)(x-2y)-(3x-2y)(x-3y)
(x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3)
化简求值{(x=2y)(5x-2y)-(3x+2y)(3x-2y)]/4x,其中x=2,y=-1