# Is #9x^2 + 24x + 64# a perfect square trinomial, and how do you factor it?

##### 1 Answer

Jun 2, 2015

No, it is not. The perfect square trinomial is:

f(x) = 9x^2 + 24x + 64.

D = d^2 = 576 - 2304 = -1728 < 0,

This trinomial can't be factored because its D is not a perfect square.