Question

resultado da equaçao de 2 grau a=2,b=3,c=-5

Answer 1

Δ=$b^{2} +(-4).a.c$
Δ=9-4.2.(-5)
Δ=9+40
Δ=49

X=-3+7/2.2=1
X'=-3-7/2/2=-5/2