(x-y-z)*( )=x^2-(y+z)^2 填空
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(x-y-z)*()=x^2-(y+z)^2填空(x-y-z)*()=x^2-(y+z)^2填空(x-y-z)*()=x^2-(y+z)^2填空(x-y-z)*(x+y+z)=x^2-(y+z)^2（
(x-y-z)*( )=x^2-(y+z)^2 填空
(x-y-z)*( )=x^2-(y+z)^2 填空
(x-y-z)*( )=x^2-(y+z)^2 填空
(x-y-z)*(x+y+z )=x^2-(y+z)^2
（x-y-z）×（x+y+z）=x²-（y+z）² 希望对你有帮助，满意请及时采纳， 你的采纳是我回答的动力！
用行列式的性质证明：y+z z+x x+y x y z x+y y+z z+x =2 z x y z+x x+y y+z y z x 这个怎么证?
(x-2y+z)(x+y-2z)分之（y-x)(z-x) + (x+y-2z)(y+z-2x)分之(z-y)(x-y) + (y+z-2z)(x-2y+z)分之（x-z)(y-z)=?第三部分那个是 （y+z-2x)(x-2y+z)分之（x-z)(y-z)
(x+y-z)(x-y+z)=
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z
已知：x^2/(z+y)+y^2/(x+z)+z^2/(x+y)=0,求x/(z+y)+y/(x+z)+z/(x+y)的值.
x^2/(z+y)+y^2/(x+z)+z^2/(x+y)=0,求x/(z+y)+y/(x+z)+z/(x+y)的值
(x+y-z)^2-(x-y+z)^2=?
(x-y-z)*( )=x^2-(y+z)^2 填空
分解因式:f(x,y,z)=x^2(y-z)+y^2(z-x)+z^2(x-y)
X+Y+Z=?
证明 ：x/(y+z)+y/(z+x)+z/(x+y)>=3/2其中 x,y,z>0
x/y=(x+z)/(y+z)y/z=(x+y)/(x+z)
已知 x/(y+z)+y/(z+x)+z/(x+y)=1求 (x*x)/(y+z)+(y*y)/(x+z)+(z*z)/(x+y)=?
x+2y=3x+2z=4y+z 求x:y:z
x+y/2=z+x/3=y+z/4 x+y+z=27
若x+y+z=3y=2z,则x/x+y+z=?
x+y+z=14 7z=x+y+2 x+z=y