(x-y)4+12(x-y)+36
(x-y)^2+12(x-y)+36
计算 [12(x+y)³(y-x)]³÷[4(x+y)²(x-y)]²
x(x-y)+4(y-x)因式分解
4(x+y)^2-12(x+y)(x-y)+9(+y)^2因式分解,
{(x,y) |x|+|y|
x>y?x:y
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y除以2x-y
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y的值
已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值
化简(x+y)-(2x+y/2)-(3x+y/6)-(4x+y/12)-(5x+y/20)-……-(10x+y/90)
(2x-y)²-4(x-y)(x+2y)