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：2024/07/28 12:35:26

x��)��ШЮ��ըЭԄ0+�t��\ak�kd``�Si�kdY�=��ճ��,|�~� Ovt�=kX��}׳�K��߶�R�y˶��lޜg }Ovv<_7]�&�H�4{�:�[��hg��V��YkWT��ZJC�UBh�8 �C5�4�ՄH�"d��Z&h�PY��m�_\��g '0��\�D�݉`��#�

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|