Question

use the quadratic formula to find the zero of f(x)=x^2-x-6

Answer 1

a=1 b=-1 c=-6
\[(-b \pm \sqrt{b ^{2}-4ac})/(2a)\]
\[(1\pm \sqrt{(-1)^{2}-4(1)(-6)})/(2)(1)\]
\[(1\pm \sqrt{1+24})/2\]
\[(1\pm5)/2\]
6/2=3, -4/2=-2
3,-2