Answer :

On comparing with standard quadratic equation that is

we have,


a = 1, b = – 25 and c = 100


Now here,


Product a × c = 1 × 100 = 100


Factors of 100; 1 × 100; 2 × 50; 4 × 25;20 × 5


Sum should be b = – 25


From above factors ( – 20m – 5m)


will give – 25m sum


therefore – 25m is replaced by ( – 20m – 5m)


Now above eq. becomes



; taking m and – 5 common


(m – 5)(m – 20)


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