Question

x ao quadrado -(-2) igual a 0
pfv preciso de ajuda

Answer 1

x² - ( - 2) = 0

∆ = b² - 4.a.c

∆ = (-2)² -4.1.0

∆ = 4 - 0

∆ = 4

x = (-b ± √∆) / 2.a

x = -(-2) ± √4 / 2.1

x = 4 ± 2 / 2

x' = 4 + 2 / 2

x' = 6/2 = 3

x'' = 4 - 2 / 2

x'' = 2 / 2 = 1

S = {3,1}