Question

B² - 4b = 5 + 2b
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

b² -6b -5 = 0

delta = (-6)²-(4.1.-5)    delta = 36-(-20)     delta = 56

x = (6+-²√56)/2.1     x = (6+²√56)/2  e (6-²√56)/2

Answer 2

b² - 4b = 5 + 2b
b² - 4b - 2b - 5 = 0
b² - 6b - 5 = 0
a = 1; b = - 6; c = - 5
Δ = b² - 4ac
Δ = (-6)² - 4.1.(-5)
Δ = 36 + 20
Δ = 56
√Δ = √4.√14
√Δ = 2√14

x = - b +/- √Δ    = - (-6) +/- √56
      ---------------    --------------------
              2a                  2.1

x = 6 + 2√14   =  3 + √14
      -------------
             2

x = 6 - 2√14     =  3 - √14
      -------------
            2