SSC (English Medium) Class 8Maharashtra State Board
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Expand (2m − 5)3 - SSC (English Medium) Class 8 - Mathematics

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Question

Expand

 (2m − 5)3

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`

  Is there an error in this question or solution?

APPEARS IN

 Balbharati Solution for Balbharati Class 8 Mathematics (2019 to Current)
Chapter 5: Expansion formulae
Practice Set 5.3 | Q: 1.1 | Page no. 27
Solution Expand (2m − 5)3 Concept: Expansion of (A - B)3.
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