Factor the Trinomial 9x^2-30x+25 Where There is No GCF & the Leading Coefficient a=9

Factor the trinomial 9x^2-30x+25. There is no GCF and the leading coefficient, a, is 9. This trinomial is factored using the ac method. The trinomial is compared to ax^2+bx+c and the values of a, b, and c are found. Two numbers are needed that multiply to ac and add to b. In case the required numbers do not come to mind quickly, a systematic method is shown on how to find these numbers. The middle term is then broken up into two terms. The resulting 4 terms are then factored by grouping. After the answer is obtained, this expression is also investigated as a perfect square trinomial.

Timestamps:
0:00 Introduction
0:26 Use ac (or Grouping) Method
3:35 Factor by Grouping