Question

x2-3x+2=0 qual a resposta

Answer 1

x² -3x +2 = 0
x² -x -2x +2 = 0
x • (x - 1) -2x +2 = 0
x • (x - 1) -2 • (x - 1) = 0
(x - 1) • (x -2) = 0
x -1 = 0
x -2 = 0

x = 1
x = 2

Answer 2

Olá!!!

Resolução!!!

x² - 3x + 2 = 0

a = 1, b = - 3 , c = 2

∆ = b² - 4ac
∆ = ( - 3 )² - 4 • 1 • 2
∆ = 9 - 8
∆ = 1

x = - b ± √∆ / 2a
x = - ( - 3 ) ± √1 / 2 • 1
x = 3 ± 1 / 2
x' = 3 + 1 / 2 = 4/2 = 2
x" = 3 - 1 / 2 = 2/2 = 1

S = { 1, 2 }

Espero ter ajudado!!