quadrtic formula x^2+x-18=0

Answer 1

[ -1 +/- sqrt (1 + 72) ] / 2

- 1/2 +/- (1/2) sqrt (73)

Hey
if
a x^2 + b x + c = 0
then
x = [ -b +/- sqrt(b^2 - 4 a c) ] / (2a)