Cos(60+x-x) = 0.5
cos 60 = 0.5
(3х+1)²-6х=3
(a+b)²=a²+2ab+b²
(3х+1)²=3²x²+2*3x*1+1²=9x²+6x+1
9x²+6x+1-6x=3
9x²+1=3
9x²=3-1
9x²=2
![x^{2} = \frac{2}{9} \\ x=\pm \sqrt{ \frac{2}{9}} \\ x=\pm\frac{ \sqrt{ 2}}{ \sqrt{ 9} } \\ x=\pm \frac{ \sqrt{2} }{3}](https://tex.z-dn.net/?f=+x%5E%7B2%7D+%3D+%5Cfrac%7B2%7D%7B9%7D++%5C%5C+x%3D%5Cpm++%5Csqrt%7B+%5Cfrac%7B2%7D%7B9%7D%7D++%5C%5C+x%3D%5Cpm%5Cfrac%7B++%5Csqrt%7B+2%7D%7D%7B+++%5Csqrt%7B+9%7D+%7D+%5C%5C+x%3D%5Cpm++%5Cfrac%7B+%5Csqrt%7B2%7D+%7D%7B3%7D+)
-3<х<2 вроде так, я точно не помню но как то так
А) (3а-2в)2(ав-1)=(3а-2в)(3а+2в)(4ав-1)
a^m*a^n = a^(m+n)
a^m/a^n = a^(m-n)
ⁿ√a^m = a^(m/n)
⁴⁶√3*¹⁶√3 / ¹²√3 = 3^(1/46 + 1/16 - 1/12) = 3^1/1104 = ¹¹⁰⁴√3
1/16 - 1/12 = 3/48 - 4/48 = - 1/48
1/46 - 1/48 = 1/2 *(1/23 - 1/24) = 1/2 * 1/ 552 = 1/1104