Compute \((\sqrt{23} + \sqrt{5})(\sqrt{23} - \sqrt{5})\)
Here is a formula... (a+b)(a-b)=a^2-b^2
So, let's use that formula here!
\((sqrt(23)+sqrt(5))(sqrt(23)-sqrt(5))\)
would equal (sqrt(23))^2 - (sqrt(5))^2
This is equal to 23-5, which is 18.
+2094 
