Question

find the solution set by factoring and using zero product rule or by using the quadratic formula
x^2+9x-1=0

Answer 1

use x= -9+-(sqrt(81+4))/2

Answer 2

coefficients are a=1 b=9 c=-1
x=-(9)+/- sqrt[(9^2)-4(1)(-1)] all divided by 2(1).
x=-9+/- sqrt[(81)-4(-1)] all divided by 2
x=-9+/-sqrt[(81+4)]/2
x=-9+/-sqrt[85]/2
this really can't be implified any further