Which of the following is NOT a perfect square trinomial? Group of answer choices

^2+20−100

4^2−20+25

^2+18+81

16^2−24+92

my answer is 4^2−20+25 heheheheof

expression #3 is not equivalent. the others are.

part 1 answer = 8

part 2 answer = 72

step-by-step explanation:

part 1 explanation = add all of the numbers, then divide by how many numbers you have. so, 200/25 = 8.

part 2 explanation = not gonna lie, this is hard to explain, so just google how to do it.