Question

RESOLVA X²- 3X + 2 = 0

Answer 1

X² - 3 X + 2 = 0
Δ = b² - 4 a. c
Δ = (-3)² - 4 . 1 . 2 
Δ = 9 - 8
Δ = 1 ⇒√1 = 1
x = - b +ou - 1/2.1
x = -(-3) + ou - 1/2
x´= 3 + 1/2
x´= 4/2
x = 2
x´´ = 3 - 1/2
x´´ = 2/2 ⇒ 1
S = {1 ; 2 }