Question

calculo completo da equação do segundo grau completa na formula de bhaskara:
-2x elevado a 2 +3x+5=0

Answer 1

Explicação passo-a-passo:

$-2x^2+3x+5=0$

$\Delta=3^2-4\cdot(-2)\cdot5$

$\Delta=9+40$

$\Delta=49$

$x=\dfrac{-3\pm\sqrt{49}}{2\cdot(-2)}=\dfrac{-3\pm7}{-4}$

$x'=\dfrac{-3+7}{-4}~\longrightarrow~x'=\dfrac{4}{-4}~\longrightarrow~x'=-1$

$x"=\dfrac{-3-7}{-4}~\longrightarrow~x"=\dfrac{-10}{-4}~\longrightarrow~x"=\dfrac{5}{2}$