x(x+y)-(x-y)(x+y)-y^2,当x=4^-2007,y=-4^2008.我只想校对一下.急!我化出来原式=xy.然后结果怎么算!
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/15 01:46:20
![x(x+y)-(x-y)(x+y)-y^2,当x=4^-2007,y=-4^2008.我只想校对一下.急!我化出来原式=xy.然后结果怎么算!](/uploads/image/z/5907060-36-0.jpg?t=x%28x%2By%29-%28x-y%29%28x%2By%29-y%5E2%2C%E5%BD%93x%3D4%5E-2007%2Cy%3D-4%5E2008.%E6%88%91%E5%8F%AA%E6%83%B3%E6%A0%A1%E5%AF%B9%E4%B8%80%E4%B8%8B.%E6%80%A5%21%E6%88%91%E5%8C%96%E5%87%BA%E6%9D%A5%E5%8E%9F%E5%BC%8F%3Dxy.%E7%84%B6%E5%90%8E%E7%BB%93%E6%9E%9C%E6%80%8E%E4%B9%88%E7%AE%97%21)
x(x+y)-(x-y)(x+y)-y^2,当x=4^-2007,y=-4^2008.我只想校对一下.急!我化出来原式=xy.然后结果怎么算!
x(x+y)-(x-y)(x+y)-y^2,当x=4^-2007,y=-4^2008.
我只想校对一下.
急!
我化出来原式=xy.然后结果怎么算!
x(x+y)-(x-y)(x+y)-y^2,当x=4^-2007,y=-4^2008.我只想校对一下.急!我化出来原式=xy.然后结果怎么算!
x(x+y)-(x-y)(x+y)-y^2
=x²+xy-x²+y²-y²
=xy
=4^(-2007)*(-4^2008)
=-4^(-2007)*4^2007*4
=-4^(-2007+2007)*4
=-4^0*4
=-4
x(x+y)-(x-y)(x+y)-y^2
=(x+y)(x-x+y)-y2
=xy
=4^-2007*(-4^2008)
=4^(-2007+2008)
=4
{(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/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|
x y x+yy x+y xx+y x y
化简y(x+y)+(x+y)(x-y)-x^2
|x|+|y|