Question

a soma das raizes das equacoes - 7x + 7 = 0 e - 2x - 2 = 0 e igual a a) 0 b) 1 c) 2 d) - 2

Answer 1

- 7x + 7 = 0

- 7x = 0 - 7

- 7x = - 7 . (-1)

7x = 7

x = 7

---

7

x = 1

- 2x - 2 = 0

- 2x = 0 + 2

- 2x = 2 . (-1)

2x = - 2

x = - 2

---

2

x = - 1

Soma : 1 + (-1) = 1 - 1 = 0

Letra A

Answer 2

Resposta:

Olá,

→ A) 0.

-7x + 7 = 0

-7x = 0 - 7

-7x = -7

-7x/-7 = -7/-7

7x/7 = 7/7

x = 7/7

x = 1

-2x - 2 = 0

-2x = 0 + 2

-2x = 2

-2x/-2 = 2/-2

2x/2 = 2/-2

x = 2/-2

x = -1

→ 1 + (-1) =

→ 1 - 1 =

→ 0

Ω | Ass: Sukehiro Demon | Ω

Espero ter ajudado!