Question

-2x²+3x+5=0

qual será a solução?

Answer 1

$-2x^2+3x+5=0\\\Delta=3^2-4.(-2).5\\\Delta=9+40\\\Delta=49$

$x= \frac{-3\pm7}{-4} \left \{ {{x'= \frac{-3-7}{-4}= \frac{5}{2} } \atop {x''= \frac{-3+7}{-4}=-1 }} \right.$