Question

$- {x}^{2} - 7x = 0$
calcule a sua raiz:​

Answer 1

Resposta:

$x^2-7x=0\quad :\quad x=-7,\:x=0$

Explicação passo a passo:

$x_{1,\:2}=\frac{-\left(-7\right)\pm \sqrt{\left(-7\right)^2-4\left(-1\right)\cdot \:0}}{2\left(-1\right)}$

$x_{1,\:2}=\frac{-\left(-7\right)\pm \:7}{2\left(-1\right)}$

$x=-7,\:x=0$