Rewrite as .

Check that the middle term is two times the product of the numbers being squared in the first term and third term.

Rewrite the polynomial.

Factor using the perfect square trinomial rule , where and .

Factor a^2+4a+4

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# Factor a^2+4a+4

Check that the middle term is two times the product of the numbers being squared in the first term and third term.

Rewrite as .

Rewrite the polynomial.

Factor using the perfect square trinomial rule , where and .

Factor a^2+4a+4