Question

f(x)=x2 - 2x - 3 f(x) =4

Answer 1

0 = x² -2x -7

$\Delta = b^{2} -4ac$
4 +28
32 → 2⁵ → 4√2

$x = \frac{-b \pm \sqrt{\Delta} }{2a}$
2 ± 4√2/2
1 ± 2√2

{1 + 2√2 , 1 - 2√2}