Question

Resolva as equac̦ões:

a) |x−5|=3

b) ∣∣x2−x−1∣∣=1

Answer 1

Resposta

a) x1= 2, x2= 8

b) x1= 0, x2= 2

Explicação passo a passo:

a)

|x-5|=3

x-5= 3

x-5= -3

x=8

x=2

b)

∣∣x2−x−1∣∣=1

∣2x−x−1∣= 1

∣x-1∣= 1

x-1 = 1

x-1 = -1

x= 2

x= 0