Question

Funçao Quadrática:
f (x) = x elevado à 2 + 7x + 12

Answer 1

f(x) = x² + 7x + 12
0 = x² + 7x + 12
x² + 7x + 12 = 0
a = 1; b = 7; c = 12
Δ = b² - 4ac
Δ = 7² - 4.1.12
Δ = 49 - 48
Δ = 1

x = - b +/-√Δ        - 7 +/- √1
      -------------  =  -----------------
            2a                 2.1

x = - 7 + 1
      ----------- = - 6/2 = - 3
          2

x = - 7 - 1
      --------- = - 8/2 = - 4
           2