m^4-m^2-2m-2=0,求m的解
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m^4-m^2-2m-2=0,求m的解
![m^4-m^2-2m-2=0,求m的解](/uploads/image/z/20252742-6-2.jpg?t=m%5E4-m%5E2-2m-2%3D0%2C%E6%B1%82m%E7%9A%84%E8%A7%A3)
m^4-m^2-2m-2=0
m^4-m^2+1+m^2-2m-3=0
(m^2-1)+(m+1)(m-3)=0
(m^2-1)=0且(m+1)(m-3)=0
m=-1
m^4-m^2+1+m^2-2m-3=0
(m^2-1)+(m+1)(m-3)=0
(m^2-1)=0且(m+1)(m-3)=0
m=-1
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