150^(3/2) / 6^(3/2)= (150 : 6)^3/2= 25^(3/2)= (5^2)^3/2 =
= 5^(2 * 3/2) = 5^ 3 = 125
X^2+3x-3=0 |*-1
x^2-3x+3=0
3+-√9-12
x=---------------
2
Ответ: нет корней
12x^2-7x+1=0
7+-√49-48
х=---------------------
24
7+-1
х=---------
24
х=1/3
х=1/4
Ответ:1/2; 1/4
5x+y=14
y=2x
---------------
5x+2x=14
7x=14, x=2
y=4
/x,y/=/2,4/
6-5=1(км)-прошёл 1 пешеход
ответ:1км
Sin22°30'=± √1/2(1-Cos45°)= ±√1/2(1-√2/2)= ±√(1/2 - √2/4)=±√((2 - √2)/4)=
=±√(2-√2)/2
Cos22°30'= ±√(1-Sin²22°30')= ±√((1-2 +√2)/4)= ±√(√2 -1) /2
tg22°30' = Sin22°30'/Cos22°30' = ±√(2-√2)/2/±√(√2 -1) /2= ±√(2-√2)/√(√2 -1)