Question

3)Expand the following (m + 2n)
$(m + 2n) ^{2}$
​

Answer 1

Answer:

${(m + 2n)}^{2}$

Using identity

${(a + b)}^{2} = {a}^{2} + {b}^{2} + 2ab$

= ${(m)}^{2} + {(2n)}^{2} + 2(m)(2n)$

= ${m}^{2} + {4n}^{2} + 4mn$

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