Question

Exercitiile 1,2,3 și 6 urgent, ajutooor!!​ mă mulțumesc doar cu primele 2 exercitii

Answer 1

Răspuns:

-2x+3>0; 3>2x; 3/2>x

4-3(1-x)<x-3 ; 4-3+3x<x-3; 1+3x<x-3; 4<-2x; 2<-x; x<-2

5x-7>=4x+11; 5x-4x>=11+7; x>=19

-3x+1<2x+6; -3x-2x<6-1; -x<5; x<-5

4+5(x-2)=<(3x+2)*3-4 ; 4+5x-10=<9x+6-4; 5x-6=<9x+2; -8=<4x; -2=<x

3(1-x)-2(4-x)>1+2x ; 3-3x-8+2x>1+2x ; 11-x>1+2x; 10>3x sau 3x<10; x<10/3

2

x-3(x+2)=<-2x+5(x+1); x-3x-6=<-2x+5x+5 ; -2x-6=<3x+5 ; -5x=<11;-x=<11/5; x=<-11/5

(x+1)(x+1) - (x-1)(x-1)>=2x+4 ; x*x+2x+1-x*x-2x+1>=2x+4;2>=2x+4; -2>=2x; -1>=x

(2-x)(2+x) + (x+2)(x+2) <x-1; 4-x*x+x*x+4x+4<x-1; 8+4x<x-1; 3x<-9; x<-3

4(x-3)+5>3(x-1)-(4-x) ; 4x-12+5>3x-3-4+4x; 4x-7>7x-7; -3x>0

Explicație pas cu pas: