Factor this expression completely. x2 + 6x + 9

x² + 6x + 9 = (x + 3) (x + 3)

Step-by-step explanation:

It is given a quadratic equation

x² + 6x + 9

To find the factors of given expression

By using middle term splitting

Let f (x) = x² + 6x + 9

= x² + 3x + 3x + 9

= x (x + 3) + 3 (x + 3)

= (x + 3) (x + 3)

Therefore the factors of x² + 6x + 9

(x + 3) (x + 3)