来自秦品乐的问题
(x+y+z)*(-x+y+z)*(x-y+z)*(x+y-z)=
(x+y+z)*(-x+y+z)*(x-y+z)*(x+y-z)=
1回答
2020-06-21 01:08
(x+y+z)*(-x+y+z)*(x-y+z)*(x+y-z)=
(x+y+z)*(-x+y+z)*(x-y+z)*(x+y-z)=
(x+y+z)*(-x+y+z)*(x-y+z)*(x+y-z)因数1234=(x+y+z)*(x+y-z)*(-x+y+z)*(x-y+z)将因数1与因数4结合,因数2与因数3结合=[(x+y)^2-z^2]*{[z-(x-y)][z+(x-y)]}对因数1和4应用平方公式(a+b)(...