Question

Solve the proportion

Answer 1

Follow the same steps
1) cross multiply

Answer 2

60=? I'm not sure how to multiply x+2 and x-2

Answer 3

to do
(x+2)(x-2)
use FOIL
http://www.khanacademy.org/math/algebra/multiplying-factoring-expression/multiplying-binomials/v/multiplying-polynomials1

Answer 4

x^2-2x+2x-4=60?

Answer 5

yes. but notice that -2x + 2x is 0 (2 x's take away 2 x's leaves 0 x's)
so it simplifies to
x^2 -4 = 60

btw, people memorize the pattern (a + b) (a - b ) = a^2 - b^2

Answer 6

x^2 -4 = 60

what is the next step ?

Answer 7

x^2=64

Answer 8

yes.

now take the square root of both sides