X^2-6x+9
25-x^2
36x^2-12x+1
36x^2-4
4+16a+16a^2
9b^2-1
49x^2-56x+16
162x^2+36x
(7+2a)=49a^2+28a+4b^2
3^x=9
3^x=3^2
x=2
3^2=9
2^x=16
2^x=2^4
x=4
2^4=16
0.5^x=0.125
0.5^x=0.5^3
x=3
0.5^3=0.125
6^(2x-8)=216^x
6^(2x-8)=6^3x
2x-8=3x
2x-3x=8
-x=8
x=-8
Смотри ///////////////////