Question

Me ajudaa pfvvv!!!!!!!

Answer 1

x² + 2x - 3 = 0

a = 1

b = 2

c = - 3

∆ = b² - 4 . a . c

∆ = 2² - 4 . 1 . (-3)

∆ = 4 + 12

∆ = 16

x = - b ± √∆

-------------

2a

x' = - 2 - 4

----------

2 . 1

x' = - 6

---

2

x' = - 3

x" = - 2 + 4

----------

2 . 1

x" = 2

---

2

x" = 1

S = {-3 , 1}

Letra A