Sir than what are the consecutive positive integer i.e. x=?After the e

This question was asked in Ex 4.1, 2

Sir than what are the consecutive positive integer i.e. x=?
After the equation x^2 x-360=0
A=1 b=1 c=-360
Which method should i use
1. Factorisation method
2.formula method
Which method would be convenient for it.
Sir please give the answer as soon asposible