Factorise $a^{2} + b^{2} + c^{2} + 2 (a b + b c + c a) :$

{(a + b + c)}^{2}

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(a + b + c)

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(a + b + 2 c)

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(b + c + 2 a)

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Solution

The correct option is A ${(a + b + c)}^{2}$
We have,
$a^{2} + b^{2} + c^{2} + 2 (a b + b c + c a)$

$\Rightarrow (a + b + c)^{2}$

Hence, this is the answer.

Suggest Corrections

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