when the sum of a number plus three is squared it is 9 more

when the sum of a number plus three is squared, it is 9 more than a number plus 2 when squared

Solution

Just choose a variable, and indicate what represent:

n ---- number, then convert the the statement of program to algebraic expression and solve

Just like

( n+3 ) 2 when sum of a number added 3 squared
(n + 3 ) 2 = ( n+2 )2 + 9 more that 9 when sum plus 2 squared.

Now there is a equation with one variable is set to solve.