Question

How do you factor the expression `9x^2 + 6x +1`?

Answer 1

`9x^2+6x+1 = (3x+1)^2`

Explanation:

Does that `9, 6, 1` pattern remind you of anything?

Maybe you know that `961 = 31^2`

If you do, then you might realise that:

`9x^2+6x+1 = (3x+1)^2`

This is a perfect square trinomial.