y(x+y)+(x+y)×(x-y)-x平方
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y(x+y)+(x+y)×(x-y)-x平方y(x+y)+(x+y)×(x-y)-x平方y(x+y)+(x+y)×(x-y)-x平方=xy+y平方+x平方-y平方-x平方=xy
y(x+y)+(x+y)×(x-y)-x平方
y(x+y)+(x+y)×(x-y)-x平方
y(x+y)+(x+y)×(x-y)-x平方
=xy+y平方+x平方-y平方-x平方
=xy
:x(x-y)-y(y-x) m(x-y)²-x+y
(x-y)(x-y)2(y-x) (x+2y-?)(x-2y+?)
x(x-y)²-y(y-x)²
(x-2y)(x+y)+(x+y)计算
-3(x-y)(x-y)+3(x-y)
计算:(x-y)^2-(x+y)(x-y)
(X-Y)(Y-X)²(X-Y)三次方
2(x-y)²-3(x-y)(-y-x)
用行列式性质计算(需过程):(x,y,x+y; y,x+y,x; x+y,x,y )
-{-[-(x-y)]}+{-[(x+Y)]}
(x-y/x+2y)³
m(x-y)平方-x+y
3(x-1)³y-(1-x)³z m(x-y)²-x+y x²(x+y)(y-x)-xy(x+y)(x-y) 因式分解
y(x+y)+(x-y)²-(x+y)(x-y),其中x=-1/3,y=3
{(x,y) |x|+|y|
x>y?x:y
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
x+x+x+y+y=54,x+x+y+y=46在这种情况下,x=(?)y=(?)