1. Factorise
9m2 + 30m + 25
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By using ————— a²+2ab+b²
= (3m)² + 2×(3m)×(5) + (5)²
= (3m + 5 )²
= (3m + 5 ) (3m + 5 ) .
Answered by RUDRA MADHAB SAHOO .
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