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What is the answer4m2+5m2-8m-10

4m3+5m-8m-10

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1 Answer

4m3+5m2-8m-10=0

(4m3+5m2)-(8m+10)=0

m2(4m+5)-2(4m+5)=0

(m2-2)(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