How do I write my x intercepts as an ordered pair when my X-Intercepts at X = { 2.64575, -2.64575 }?

Answer 1

Your x intercepts (or "roots" or "solutions"r "zeros") are solutions where the parabola
y = a x^2 + b x + c
crosses the x axis where y = 0
so, if you have two real roots, or whatever you want to call those crossings of the x axis, they are where y=0
so
( x1 , 0 ) and (x2 , 0 )