Log2 (16)^1/2
log2 4
log2 2^2 =2
ответ =2
√(27+10*√2)=√(25+2*5*√2+2)=√(5²+2*5*√2+(√2)²)=√(5+√2)²=5+√2.
|5х - 4·(2х + 30)| = 6
|5x - 8x -120| = 6
|-3x - 120| = 6
-3x - 120 = 6 -3x - 120 = -6
x = -126 : 3 x = -114 : 3
x = -42 x = -38
Ответ: {-38; -42}
Сокращаем у
2х=8
х= 4
4+у=7
у=7-4
у = 3