Q.no.1. Expand it . [2m+1/5]^3
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Step-by-step explanation:
[2m+1/5]³
It is in the form (a+b)³ = a³ + 3a²b + 3ab² + b³
(2m+1/5)³ = (2m) ³ + 3(2m)²(1/5) + 3(2m)(1/5)² + (1/5)³
= 8m³ + 3(4m²)(1/5) + 6m(1/25) + 1/125
= 8m³ + 12m²/5 + 6m/25 + 1/125
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