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9)Rezolvati inecuatia:
a)2(7x-2)+6 mai mic 0
b)-4x-2(x-5)≤0
c)2(x-3)+5(x-1) mai mare 0
d)√2(x-3)+3(√2-1)≥0


Răspuns :

a)2(7x-2)+6< 0
14x-4+6< 0
14x< -2
x<-1/7

b)-4x-2(x-5)≤0
-4x-2x+10≤0
-6x≤-10
6x≥10
x≥5/3
c)2(x-3)+5(x-1)> 0
2x-6+5x-5> 0
7x> 11
x>11/7

d)√2(x-3)+3(√2-1)≥0
x√2-3√2+3√2-3≥0
x√2≥3
x≥3/√2