Question

x ao quadrado-x-10=0?

Answer 1

Olá!

Considerando a fórmula de bhaskara,

$\fbox{ \displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a} }$
_______________________

Resolução

$x^2 - x - 10 = 0$

$\Delta = b^2 - 4ac$

$\Delta = 1 - 4\cdot 1\cdot - 10$

$\Delta = 41$

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

$x = \frac{1 ~\pm~ \sqrt{41}}{2}$

$x' = 3,7016$

$x" = - 2,7016$

________________________

Abraços! ☯