Question

Which polynomial is a perfect square trinomial?

36x2 − 18x − 9


4a2 − 28a − 49


25b2 − 40b + 16


4x2 − 6x + 9

Answer 1

Explanation:

my calculator got 36x*2-18-27/4

Answer 2

The third one

Explanation:

The process would be figuring out the square root of the first and last term of each equation, after doing so, you would take that number (square root of first and last number) then you do 2(a)(b) which would be which should be the middle term. In this case 2(5)(4) = 40 which is correct.