Question

64x^2-80x+25

factor as perfect square trinomial whereever possible

Answer 1

(8x - 5^2)

Answer 2

Do you understand why?

Answer 3

a^2 - 2ab + b^2 = (a - b)^2
Here, a^2 = 64x^2, so a = 8x
Also, here b^2 = 25, so b = 5

Answer 4

I do not think that one is correct

Answer 5

(8x - 5)^2 is correct