Sum
Expand
`(2m + 1/5)^3`
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Solution
`(2m + 1/5)^3`
= `(2m)^3 + (1/5)^3 + 3 xx (2m)^2 xx (1/5) + 3 xx (2m) xx (1/5)^2`
= `8m^3 + 1/125 + (12m^2)/5 + (6m)/25`
Concept: Expansion of (a + b)3
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