Question

a alternativa expressa as raizes da equaçao do segundo grau abaixo e:x2-3x+2=0

Answer 1

x² - 3x + 2 = 0

Δ= (-3)² - 4 . 1 . 2
Δ= 9 - 8
Δ= 1

x= 3 ± 1 / 2
x'= 4/2 = 2
x"= 2/2 = 0


S={ 2 , 0 }

Answer 2

x² - 3x + 2 = 0

a = 1

b = (- 3)

c = 2

∆ = b² - 4ac

∆ = (- 3)² - 4 × 1 × 2

∆ = 9 - 8

∆ = 9

x = - b ± √∆ /2a

x = - (- 3) ± √1 /2 × 1

x = 3 ± 1/2

x¹ = 3 + 1/2 = 4/2 = 2

x² = 3 - 1/2 = 2/2 = 1

S = {1, 2}