a) (x-2-x)(x-2+x)<4(x-1)
-2(2x-2)-4(x-1)<0
-4x+4-4x+4<0
0<0 imposibil
solutia e multimea vida
b) (x+1-x-3)(x+1+x+3)< 3(x+12)
-2(2x+4)- 3(x+12)< 0
-4x-8-3x-36< 0
-7x< 44
x> -44/7
x≥n-6
x∈ {-6,-5,-4,....}
c) 8x+8-4x+12< 3x+36
4x+ 20-3x-36< 0
x< 16
x∈ {....,-2,-1,0,.....14,15,16} (de la - infinit la 16)
d)x²+4x+4-3x-12>x²-2x-15-2
3x>-9
x>-3
x∈{-2,-1,0,1,2,3,.....}
O zi buna!