Question

E={x e N/x²=4x-3} resposta a detalhada aa pfvr

Answer 1

x² = 4x - 3
x² - 4x + 3 = 0
Δ = (-4)² - 4. 1. 3
Δ = 16 - 12
Δ = 4
x' = - (-4) + √4 ∴ x' = 4 + 2 ∴ x' = 3
              2.1                 2
x'' = 4 - 2 ∴ x'' = 1
          2
S = {3,1}

E = 3 ou E = 1