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Expand. (M + 2n +3r)2 - SSC (English Medium) Class 8 - Mathematics

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Question

Expand.

(m + 2n +3r)2

Solution

It is known that,

\[\left( a + b + c \right)^2  =  a^2  +  b^2  +  c^2  + 2ab + 2bc + 2ca\]

\[\   \left( m + 2n + 3r \right)^2 \] 

\[ =  \left( m \right)^2  +  \left( 2n \right)^2  +  \left( 3r \right)^2  + 2 \times m \times 2n + 2 \times 2n \times 3r + 2 \times 3r \times m\] \[ =  m^2  + 4 n^2  + 9 r^2  + 4mn + 12nr + 6mr\]

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APPEARS IN

 Balbharati Solution for Balbharati Class 8 Mathematics (2019 to Current)
Chapter 5: Expansion formulae
Practice Set 5.4 | Q: 1.2 | Page no. 28
Solution Expand. (M + 2n +3r)2 Concept: Expansion of (A + B + C)2.
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