Question

Dada a função h(x) = x² - 2x + 3, quantas raízes essa função tem?

Answer 1

Resposta:

x²+-2x-3=0

a= 1 b= -2 c=-3

usar Baskaras

Δ= b² – 4ac

Δ= -2²-4*1*-3

Δ=4+12

Δ=16

x'=-b+√Δ/2a

x'=-(-2)+4/2

x'=2+4/2

x'=6/2

x'=3

x''=-b-√Δ/2a

x''=-(-2)-4/2

x''=2-4/2

x''=-2/2

x''=-1