因式分解-2m六次方+6m的四次方+8m的平方

网友回答

-2m^6+6m^4+8m^2=-2m^2(m^4-3m^2-4)=-2M^2(m^2-4)(m^2+1)=-2m^2(m+2)(m-2)(m^2+1)=-2m^2(m^2+1)(m+2)(m-2)