Question

Responder questao 8

Answer 1

a) x² +2*x*2+2²+ x = 0 
x²+5x+4 = 0 
Δ = b² -4*a*c
Δ= 5² - 4*1*4
Δ = 25-16
Δ = 9
x = -b +-√Δ/2a
x= -5+√9/2*1
x1 = -5+3/2
x1= -2/2 = -1
x2= -5 - 3 / 2
x2= -8/2 = -4
S {-4,-1}