Question

Factorise :

3m² + 24m + 36

Answer 1

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$<b><i>$= 3(m² + 8m + 12)

= 3{m² + m(6 + 2) + 12}

= 3(m² + 6m + 2m + 12)

= 3{m(m + 6) + 2(m + 6)}

= 3(m+ 6) (m + 2)

Answer 2

3(m^2+8m+12)=0

m^2 +6m+2m+12=0

m(m+6)+2(m+6)=0

(m+6)(m+2)=0

m=-6,-2