Question

x ao quadrado -6x + 8 =0

Answer 1

X²-6X+8=0
Δ=b²-4ac
Δ=(-6)²-4.1.8
Δ=36-32
Δ=4
X=-b+-√Δ/2a
X=-(-6)+-√4/2.1
X=6+-2/2
X'= 6-2/2 = 4/2 = 2
X"= 6+2/2 = 8/2 = 4

S={(2,4)}

Valeu!

Answer 2

x² - 6x + 8 = 0

A= 1

B= - 6

C= 8

∆= b² - 4ac

∆= ( - 6)² - 4 • 1 • 8

∆= 36 - 32

∆= 4

x= - b ± √∆ / 2a

x= - ( - 6) ± √4/2 • 1

x= 6 ± 2/2

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

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

S= ( 4 , 2)