Question

Qual a função do zeroF(x)=x2-7x+12

Answer 1

x²-7x+12=0
-(-7)₊₋√(-7)²- 4.1.12/ 2.1
7+-√49-48/2
7+-√1/2
7+-1/2

x1= 7+1/2 = 8÷2 = 4
x2= 7-1/2 = 6÷2 = 3

Answer 2

f(x) = x² - 7x + 12
0 = x² - 7x + 12
x² - 7x + 12 = 0
a = 1; b = - 7; c = 12
Δ = b² - 4ac
Δ = (-7)² - 4.1.12
Δ = 49 - 48
Δ = 1

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

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

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