Giải các phương trình sau:
1) \(2^x=64\)
2) \(2^x . 3^x . 5^x = 7\)
3) \(4^x + 2 . 2^x - 3 = 0\)
4) \(9^x - 4.3^x + 3 =0\)
5) \(3^{2(x+1)} + 3^{x+1} = 6\)
6) \((2 - \sqrt3)^x + (2 + \sqrt3)^x = 2\)
7) \(\log_{4} (x^2+3x) = 1\)
8) \(\log_{2} (x-2) + \log_{2} (x) = 3\)
9) \(\log^2_{3} (x-3) + \log_{3} (x-3) -6=0\)