Answer:
Step-by-step explanation:
A binomial is called perfect square trinomial
if is satisfied.
For
a = 49, b = -28 and c = 16,
Thus, is not a perfect square trinomial.
For
a = 4, b = -20 and c = 25,
Thus, is a perfect square trinomial.
For
a = 25, b = -20 and c = -16,
Thus, is not a perfect square trinomial.
For
a = 16, b = -24 and c = -9,
Thus, is not a perfect square trinomial.