Answer :
Answer:
Step-by-step explanation:
(1) x^2 + 6x + 12
- this has no real roots so NOT a perfect square trinomial.
(2) x^2 + 18x + 81
= (x + 9)(x + 9)
- 2 identical factors so it is a PST.
(3) x^2 + 15x + 25
does not factor as 2 does, so NO.
Answer:
Step-by-step explanation:
(1) x^2 + 6x + 12
- this has no real roots so NOT a perfect square trinomial.
(2) x^2 + 18x + 81
= (x + 9)(x + 9)
- 2 identical factors so it is a PST.
(3) x^2 + 15x + 25
does not factor as 2 does, so NO.