Question

resolva a equacao pela formula resolutiva ou de Bháskara(xsob2-2x-8=0?

Answer 1

→ x² -2x -8 = 0

$\mathsf{\Delta=b^2-4ac}$

(-2)² -4*1 * -8

4 + 32 → 6²

$\mathsf{x = \frac{-b \pm \sqrt{\Delta} }{2a}}$

-(-2) ± √(6²)/2

2 ± 6/2 → 1 ± 3

{4 , -2}