I don't understand this problem and how it equals 1 (attached). I thought if -3 =-x squared it would be 3*3 and then plus 5. I cannot think of a way to make this 1. What am I doing wrong?

Ms. wilson draws a model of the factorization of a polynomial with integer factors. her model is partially complete.|5n40which equation is represented by ms. wilson's model? 12+ 3n+ 40 = (n -8)(n-5).2 + 130 + 40 = (n +8)(n+5)2 + 40n + 13 = (n + 8)(n+5)2 + 40n + 3 = (n -8)(n-5)oooinimi