Question

calculati discriminantul ecuatiei;determinati daca ecuatia are solutii in r si aflati solutiile in cazul in care ele exista: x²+3x+5=0 2x-x²+3=0

Answer 1

$3 x^{2} +3x+5=0$
Δ=9-20=-11
ec.nu are solutii reale
$- x^{2} +2x+3=0$
Δ=4+12=16
$x_{1}= \frac{-2-4}{-2}=3 \\ x_{2}= \frac{-2+4}{-2}=-1$