Answer :

On comparing with standard quadratic equation that is

a


we have,


a = 1, b = – 23 and c = + 120


Now here,


Product a × c = 1 × + 120 = + 120


Factors of + 120; 1 × 120; 2 × 60; 4 × 30; 8 × 15; 24 × 5; 40 × 3


Sum should be b = – 23


From above factors ( – 15m – 8m)


will give – 23m sum


therefore – 23m is replaced by ( – 15m – 8m)


Now above eq. becomes



; taking m and – 8 common


(m – 15)(m – 8)


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