Question

Use the quadratic formula to solve the quadratic equation x2 − 8x − 4 = 0.

Answer 1

use
\[x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\] with
\[a=1,b=-8,c=-4\]

Answer 2

you will get
\[x=4\pm2\sqrt{5}\]

Answer 3

try it!