Question

Y= x² -x -2
Função Quadrática...

Answer 1

boa noite

x² -x -2=0

a = 1 b = -1 c = -2

calculando o delta

Δ=b² - 4 ac

Δ=(-1)² - 4 * 1 * (-2)

Δ=1+8

Δ= 9

formula bhaskara

x=-b+-√Δ /2a

x=-(-1)+-√9 / 2*1

x=1+-3 /2

x' = 1+3 / 2

x'=4/2

x'=2

x''=1-3/2

x''=-2/2

x''=-1

s={x'=2 e x''=-1}