Simplify: $(x + 3) (x + 3)$

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Solution

The correct option is A

$(x + 3) (x + 3) = (x + 3)^{2}$

$= x^{2} + 6 x + 9$ [using $(a + b)^{2} = a^{2} + 2 a b + b^{2}$ ]

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