Question

a)2x-1/2=x*2
equaçao do 2 grau pf gente me ajudaaaaaaaaaa

Answer 1

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