Question

Resolva por delta : 3x² - x -2=0
Resolva por delta : 2x² +4x -6=0 
​

Answer 1

Resposta:

S = {-4,2}

2x²+4x-6 = 0 (:2)

x²+2x-3 = 0

∆ = b²-4ac

∆ = 4-4(1)(-3)

∆ = 16

-b+-√∆\2a

-2+-4/2

x' = -8/2 = -4

x" = 2/2 = 2