作业帮(-x-y)(x+y)和(-x-y)(x-y)的答案,最好是用完全平方差的公式.今天就要啊!
来源：学生作业帮助网 编辑：作业帮 时间：2024/08/08 12:41:50
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(-x-y)(x+y)和(-x-y)(x-y)的答案,最好是用完全平方差的公式.今天就要啊!
(-x-y)(x+y)和(-x-y)(x-y)的答案,最好是用完全平方差的公式.今天就要啊!
(-x-y)(x+y)和(-x-y)(x-y)的答案,最好是用完全平方差的公式.今天就要啊!
(-x-y)(x+y)
=-（x+y)²
=-x²-2xy-y²
(-x-y)(x-y)
=(-y-x)(-y+x)
=(-y)²-x²
=y²-x²
x+y/x-y和y+x/y-x通分
{(x,y) |x|+|y|
x>y?x:y
x^/y-x-y^/y-x化简.
化简x(y-x)-y(x-y)
行列式计算 x y x+y y x+y x x+y x y|x y x+y ||y x+y x ||x+y x y |
y/(x+y)-x/(x-y)
x-y和y-x通分
x+y和x-y比较大小
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
x y x+yy x+y xx+y x y
(3x-y)(3y+x)-(x-y)(x+y)
化简x/y(x+y)-y/x(x+y)
化简 x / y(x+y) - y / x(x+y) =
化简:(x+ y)(x-y) +(x+ y) +(x-y)
x+y
(x+y)
|x+y|