Question

qual o calculo da funcao do zero y=x²-5x+6

Answer 1

$x^{2}$ -5x+6

a= 1
b= -5
c=6

Δ= b²- 4.a.c
Δ= (-5)² - 4.1.6
Δ= 25 - 16
Δ= 9

x= $\frac{-b +/- \sqrt{9} }{2a}$
$\sqrt{9}$ = 3

x'= $\frac{5 + 3}{2}$
x'= $\frac{8}{2} = 4$

x''= $\frac{5 - 3}{2}$
x''= $\frac{2}{2} = 1$

S= {4,1}

Answer 2

y = x² - 5x + 6
0 = x² - 5x + 6
x² - 5x + 6 = 0
a = 1; b = - 5; c = 6
Δ = b² - 4ac
Δ = (-5)² - 4.1.6
Δ = 25 - 24
Δ = 1

x = - b +/- √Δ   = - (-5) +/- √1
      --------------    -------------------
             2a                2.1

x = 5 + 1
      -------- = 6/2 = 3
          2

x = 5 - 1
     ---------  = 4/2 = 2
          2

R.: {2,3}