Factor x2 plus 55x-700

Answer 1

x2 + 55x - 700 = (x + 20)(x + 35) 2x2x5x5x7
1,700=699
2,350=348
4,175=171
5,140=135
7,100=93
10,70=60
14,50=36
20,35=15
25,28=3
If you were doing x^2+55x+700 then it would be factorable with 20 and 35 but with a negative in front of the 700 it is prime.