4m3+5m^{2 }-8m-10
4m^{3}+5m^{2}-8m-10=0
(4m^{3}+5m^{2})-(8m+10)=0
m^{2}(4m+5)-2(4m+5)=0
(m^{2}-2)(4m+5)=0
(m+√2)(m-√2)(4m+5)=0
m+√2=0 m-√2=0 4m+5=0
m=√2, -√2 and -5/4
4m3+5m^{2 }-8m-10
4m^{3}+5m^{2}-8m-10=0
(4m^{3}+5m^{2})-(8m+10)=0
m^{2}(4m+5)-2(4m+5)=0
(m^{2}-2)(4m+5)=0
(m+√2)(m-√2)(4m+5)=0
m+√2=0 m-√2=0 4m+5=0
m=√2, -√2 and -5/4