Question

Use the properties of exponents to simplify
(3^2+sqrt5)(3^2-sqrt5)

Answer 1

(x+a)(x-a) = x^2 - a^2

Answer 2

3^2 = 9 so
9^2 - 5 = 81-5 = 76

Answer 3

do I do this just like I foil it

Answer 4

You do*.

Answer 5

*although foil is word I like to use. Distribute is a better word.

Answer 6

ok, we just use that in our high school.