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

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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

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