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

ConceptExpansion of (A + B + C)2

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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