Question

f(x)=-2 x ao quadrado +4x-1
a baskara e o vertice desse ai

Answer 1

Olá, Lucas, bom dia !

$-2x^2+4x-1=0$

$\Delta=4^2-4\cdot(-2)\cdot(-1)=16-8=8$

$x=\dfrac{-4\pm\sqrt{8}}{2\cdot(-2)}=\dfrac{-4\pm2\sqrt{2}}{-4}=\dfrac{-2\pm\sqrt{2}}{2}$.

$x'=\dfrac{-2+\sqrt{2}}{2}$

$x"=\dfrac{-2-\sqrt{2}}{2}$