Resposta :
Resposta:
x² - 2x - 3 = 0
a= 1; b = -2; c = -3
D = -2² - 4 . 1 . (-3)
D = 4 - 12
D = 16
x' = (-(-2) + 4)/(2 . 1)
x' = (2 + 4)/(2)
x' = (6)/(2)
x' = 3
x" = (-(-2) - 4)/(2 . 1)
x" =( 2 - 4)/( 2)
x'' = (-2)/( 2)
x'' = -1
S = {(-1, 3)}
Resposta:
x² - 2x - 3 = 0
a= 1; b = -2; c = -3
D = -2² - 4 . 1 . (-3)
D = 4 - 12
D = 16
x' = (-(-2) + 4)/(2 . 1)
x' = (2 + 4)/(2)
x' = (6)/(2)
x' = 3
x" = (-(-2) - 4)/(2 . 1)
x" =( 2 - 4)/( 2)
x'' = (-2)/( 2)
x'' = -1
S = {(-1, 3)}