Մաթեմատիկա | 05.09.23

1. 3(x-4)>7+3(1-4x) = 3x-12x> 10-12x , 3x+12x>10+12, 15x>22, x>22/15

2. 2 √9+ 3√16=2•3+3•4=6+12=18

3. (√2-1)(√2+1) = √2² — 1²=2-1=1

4. {7+3(1-4x)>= 6
{5-x<4+3x

{4>=12x => {1>=3x => xэ (1/4;1/3]
{1<4x {1/4<x