Respuesta :

adrielcavalcant
Δ = 1 + 4*20 = 81
x' = (-1 + 9)/2 = 4
x'' = (-1 - 9)/2 = -5
4²  + 4 - 20 = 0
(-5)² - 5 - 20 = 0
Ok !

Answer:-5 and 4

Step-by-step explanation:

apex