Question

$2 x^{2}-5x=-2$

Answer 1

2x² - 5x = - 2 

2x² - 5x + 2 = 0 

Δ = 25 - 16 

Δ = 9 

x = 5 +-√9/4 

x = 5 +-3/4 

x' = 5+3/4 

x' = 8/4 

x' = 2 

x'' = 5-3/4 

x'' = 2/4 

x'' = 1/2                              S = { 1/2 , 2 }                          ok