(4f-3++2) in standard form what is the expression

Adaylily farm sells a portion of their daylilies and allows a portion to grow and divide. the recursive formula an=1.5(an-1)-100 represents the number of daylilies, a, after n years. after the fifth year, the farmers estimate they have 2225 daylilies. how many daylilies were on the farm after the first year?

What is the solution of sqrt x+2-15=-3

Pls! does anybody know a shortcut for answering these types of questions in the future?