Maharashtra State BoardSSC (English Medium) 8th Standard
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Expand (2m − 5)3 - Mathematics

Sum

Expand

 (2m − 5)3

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Solution

It is known that,

`(a-b)^3 = a^3 - b^3 - 3a^2b + 3ab^2`

 (2m − 5)3

= `(2m)^3 - (5)^3 - 3 xx (2m)^2 xx 5 + 3 xx 2m xx  (5)^2`

 = `8m^3 - 125 - 60m^2 + 150m`

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APPEARS IN

Balbharati Mathematics 8th Standard Maharashtra State Board
Chapter 5 Expansion formulae
Practice Set 5.3 | Q 1.1 | Page 27
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