(3-1)² for this question do i first do whats in the brackets to turn it into 2² which would be 4, or would i apply the exponent to each number in the brackets to make it (3²-1²) which would be 8...?

James wants to promote his band on the internet. site a offers website hosting for $4.95 per month with a $49.95 startup fee. site b offers website hosting for $9.95 per month with no startup fee. for how many months would james need to keep the website for site a to be a better choice than site b?