Question

f) x² 10x + 25 = 0 - f ) x² 10x + 25 = 0 -​

Answer 1

Resposta:

-5

Explicação passo a passo:

$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\\x = \frac{-10 \pm \sqrt{10^2 - 4\times1\times25}}{2\times1}\\x = \frac{-10 \pm \sqrt{100-100}}{2}\\x = \frac{-10}{2}\\x = -5$