3x+3y/x²-y² 为什么可以化简为 3/x-y
2个回答
(3x+3y)/(x²-y²)
=3(x+y)/(x-y)(x+y)
=3/(x-y)
相关问题
化简:(x-3y)^2 -(x-3y)(x+3y)
化简x+{3y-[2y-(2x-3y)]}=______.
化简:(3x+2y)(3x-2y)+(-3x-2y)²
{x^3-2y^3-3x^2y}-{3x^3-3y^3-7x^2y} { 化简}
化简:(1)(x²-y²)-3(2x²-3y²)
化简(‐x)^3(‐y)^2‐(‐x^3 y^2)
化简3(x-2y)=2(3x+y)
-(5x-y)-3(x+y)化简
x+3y)(x-2y)-(x-y)(x+y)怎么化简
化简:5(x-y)+2(x+y)-3(x-y)