Question

determine as raizes de y=x²-26x+25

Answer 1

y = x² - 26x + 25
0 = x² - 26x + 25
x² - 26x + 25 = 0
a = 1; b = - 26; c = 25
Δ = b² - 4ac
Δ = (-26)² - 4.1.25
Δ = 676 - 100
Δ = 576

x = - b +/- √Δ      =  - (-26) +/- √576
      ----------------      ----------------------
             2a                      2.1

x = 26 + 24
      ------------ = 50/2 = 25
            2

x = 26 - 24
      ----------  = 2/2 = 1
           2