Question

x (x-5)=-6 com delta

Answer 1

x(x - 5 ) = -6
x² - 5 x = -6
x² - 5 x + 6 = 0 
Δ = b² - 4.a.c
Δ = (-5)² - 4.1.6
Δ = 25 - 24
Δ = 1 ⇒√1 = 1
x = -b + ou - 1/2.1
x´= -(-5) + 1/2
x´= 5 + 1/2 ⇒ 6/2 = 3
x´´ = 5 - 1 /2 ⇒4/2 = 2
S = {2 ;  3}