Question

what are the factors of the following polynomial? z^2 -25

Answer 1

Difference of two squares. It follows the pattern a^2 - b^2 = (a+b)(a-b)
Or you could think of factors of b^2 and then factors of 25 and see which ones work.

Answer 2

so its (z+5) (z+5)

Answer 3

(z+5) (z-5) which onee

Answer 4

Both! Yay.