Question

Determine as raízes da equação 2×2-3×-5=0​

Answer 1

Resposta:

x = [-(-3) ± √((-3)²-4.2.(-5))]/2.2  

x = [3 ± √(9+40)]/4  

x = [3 ± √49]/4  

x' = (3+7)/4 = 10/4 = 5/2  

x'' = (3 -7)/4 = -4/4 = -1