Question

How do I solve the following without using foil?
(3-radical2)(3+radical2)=

Answer 1

multiply it :) or use the pattern

Answer 2

7

Answer 3

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

Answer 4

You could recognize it as the factored form of 9-2...

Answer 5

All of these answers are confusing!

Answer 6

I can help more, have some free time, just explain what is a foil, I come from a french school initially, have just entered an English college.

Answer 7

9-2 is right