Question

a) | |3x+1| -2|=8
b) 2 la puterea x+2 + 2 la puterea x+1 + 2 la puterea x=112

Answer 1

a) 1) daca 3x-1<0 adica x<1/3 avem
|-3x-1-2|=8
3|x+1|=8  
|x+1|=8/3    daca x<-1 => -x-1=8/3 =>  x=-1-8/3, x= -11/3<-1 e buna solutia
                   daca -1<x<1/3 => x+1=8/3 => x=5/3>1/3 nu e buna
2) daca x≥1/3
|3x+1-2|=8
|3x+1|=8  
3x+1=8  (deoarece stim ca x≥1/3)
x=7/3 ≥1/3 e buna 
deci x∈ {-11/3,1/3}

O zi buna!

Answer 2

Daca ai nelamuriri , astept intrebari.