Tìm x:

\(1,\left(3x-5\right)^2-\left(3x+1\right)^2=8\)

2,\(2x.\left(8x-3\right)-\left(4x-3\right)^2=27\)

3,\(\left(2x-3\right)^2-\left(2x+1\right)^2=3\)

4, \(\left(x+5\right)^2-x^2=45\)

5, \(\left(x-3\right)^3-\left(x-3\right).\left(x^2+3x+9\right)+9.\left(x+1\right)^2=18\)

6,\(x.\left(x-4\right).\left(x+4\right)-\left(x-5\right).\left(x^2+5x+25\right)=13\)

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