已知x^2-y^2-z^2=0,将x^3-y^3-z^3化成几个一次因式的乘积的形式急
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已知x^2-y^2-z^2=0,将x^3-y^3-z^3化成几个一次因式的乘积的形式急
已知x^2-y^2-z^2=0,将x^3-y^3-z^3化成几个一次因式的乘积的形式
急
已知x^2-y^2-z^2=0,将x^3-y^3-z^3化成几个一次因式的乘积的形式急
因为x^2-y^2-z^2=0
所以y^2=(x-z)(x+z) z^2=(x-y)(x+y) x^2=(x-z)(x+z)+(x-y)(x+y)
x^3-y^3-z^3+x^2-y^2-z^2=x^2(x+1)-y^2(y+1)-z^2(z-1)
把在x^2,y^2,z^2换掉就可以了
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