Tìm x, biết

$$\begin{gathered} 1. 25x^2-9=0 \\ 2. {(x-3)}^2-4=0 \\ 3. x^2-2x=24 \\ 4. {(x+4)}^2-(x+1)(x-1)=16 \\ 5. 3{(x-1)}^2-3x(x-5)=1 \\ 6. {(6x-2)}^2+{(5x-2)}^2-4(3x-1)(5x-2) \end{gathered}$$

Tìm x, biết