Question

quanto e 6x² menos x menos 5 igual a 0?

Answer 1

$6x^2-x-5 = 0 \\ \\ \Delta = (-1)^2-4*(6)*(-5) = 1 + 120 = 121 \\ \\ \boxed{ x = \frac{-b\pm \sqrt{\Delta} }{2a} = \frac{1\pm11}{12} \left \{ {{x'=1} \atop {x''=- \frac{10}{12} = - \frac{5}{6} }}} \right. \\ \\ \\ S = \{- \frac{5}{6},1\}$

Espero ter ajudado. :))