Question

Resolva a função

Y = x^2 - 4x + 3

Answer 1

Igualamos a função a 0, no lugar do y:

x²-4x+3=0

Δ=b²-4.a.c

Δ=(-4)²-4.1.3

Δ=16-12

Δ=4

x=-b±√Δ/2a

x=4±2/2

x'=4-2/2=1

x"=4+2/2=3

S={1,3}