Question

Resolva aplicando bhaskara:

x² - 7x + 8 = 0

Answer 1

x² - 7x + 8 = 0

a = 1; b = - 7; c = 8

Δ = b² - 4ac
Δ = (-7)² - 4.1.8
Δ = 49 - 32
Δ = 17

x = - b +/- √Δ
      -------------
          2a

x = - ( - 7) +/- √17
      -------------------
              2.1

x' = 7 + √17
      -----------
          2

x" = 7 - √17
      ----------
           2