Question

equacao do 2 grau

2x2-50=o

Answer 1

Δ = b2 - 4.a.c 
Δ = 02 - 4 . 2 . -50 
Δ = 0 - 4. 2 . -50 
Δ = 400
Há 2 raizes reais.

x' = (-0 + √400)/2.2   
x'' = (-0 - √400)/2.2

x' = 20 / 4   
x'' = -20 / 4

x' = 5  
x'' = -5