Question

Calcule o valor mínimo da função expressa por: y = x² - 6x + 8.

Answer 1

x² - 6x + 8 = 0
a = 1
b = -6
c = +8
xv = -b/2a  = 6/2 = 3 ***
yv = -Delta/4a

delta = 36 -32 = 4
Yv = -4/4 = -1 ***

[3,-1]