Question

6y+2yao quafrado-8=o

Answer 1

6y + 2y² - 8 = 0

2y² + 6y - 8 = 0

Δ = b² - 4.a.c

Δ = 6² - 4.2.-8

Δ = 36 - (-64)

Δ = 36 + 64

Δ = 100

x = -b +- √Δ / 2.a

x= -6 +- √100 / 2.2

x= -6 +- 10 / 4

x = -6 +10 / 4 = 1

x' = -6 -10 / 4 = -4