20+8x-20=14x+12
8x-14x=12
-6x=12
x=-2
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1
1)5^2/3*3^2/3*3^7/3*5^1/3=5*3³=5*27=135
2)25/16-1/3+4*1=(25-16)/48+4=9/48+4=4 3/16
3)(2^7/3+2^-2/3):2^1/3=2²+2^-1=4+1/2=4 1/2
2
![1) \sqrt[3]{a^6b^3/c^3} =a^2b/c](https://tex.z-dn.net/?f=1%29+%5Csqrt%5B3%5D%7Ba%5E6b%5E3%2Fc%5E3%7D+%3Da%5E2b%2Fc)
![2)a ^{-3+7/3-1/3} =a ^{-1} =1/a](https://tex.z-dn.net/?f=2%29a+%5E%7B-3%2B7%2F3-1%2F3%7D+%3Da+%5E%7B-1%7D+%3D1%2Fa)
3
![3)a ^{1/2} (a ^{1/4} -3)(a ^{1/4} +3)/7(a ^{1/4} +3)=a ^{1/2} (a ^{1/4}-3)/7](https://tex.z-dn.net/?f=3%29a+%5E%7B1%2F2%7D+%28a+%5E%7B1%2F4%7D+-3%29%28a+%5E%7B1%2F4%7D+%2B3%29%2F7%28a+%5E%7B1%2F4%7D+%2B3%29%3Da+%5E%7B1%2F2%7D+%28a+%5E%7B1%2F4%7D-3%29%2F7+)
4
Сравним 8/27 и 1/64
512/1728>64/1728
Значит 1 корень больше 2
5
(∛a+∛b-∛a+∛b)(∛a+∛b+∛a-∛b)=2∛b*2∛a=4∛(ab)