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

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

25b2 − 40b + 16

question:

could we have options?

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10