Question

Which polynomial is a perfect square trinomial? (4 points)
a) 36x2 − 18x − 9
b) 4a2 − 28a − 49
c) 25b2 − 40b + 16
d) 4x2 − 6x + 9

Answer 1

4x2 − 6x + 9, it would be factored into (2x - 3)(2x - 3), or just (2x - 3)^2 which is a perfect square

Answer 2

Answer: I know this is 2 years and 9 months late but the answer is c)

25b2 − 40b + 16