Question

essa só preciso da 3 , me ajudem

Answer 1

x² - 6x +8 = 0
-b/c = 6/8 = 2+4/2.4 => x'=2, x"=4

Bhaskara:
∆=(-6)²-4.1.8= 36-32=4 => √∆=2
x=-b±√∆/2a
x= 6±2/2
x'= 6-2/2 = 4/2 = 2 ✓
x"= 6+2/2 =8/2= 4 ✓

Answer 2

f(x) = x² - 6x + 8

∆= (-6)² - 4 • 1 • 8
∆= 36 - 32
∆= 4

x= - (-6) ± √4/2• 1
x= 6 ± 2/2

x' = 6 + 2/2 = 8/2 = 4
x''= 6 - 2/2 = 4/2 = 2

S=(2 , 4)