Question 62041
0 = x^2 - x - 5
5 = x^2 - x
21/4 = (x - 1/2)^2
+- sqrt(21)/2 = x - 1/2
(1 +- sqrt(21))/2 = x
You can also use the quadratic formula.
{{{graph(300,300,-10,10,-10,10,x^2 - x - 5)}}}