# How do you know if #24a^2 + 26a + 9# is a perfect square trinomial and how do you factor it?

##### 1 Answer

May 31, 2015

It isn't a perfect square trinomial. If it were then you would expect that the leading coefficient

We can try matching the first and last coefficients with real numbers...

Alternatively we can match the first two coefficients:

Worse, the discriminant is negative:

This means that

So