`ĐK: 4x - 17 >= 0`
`<=> x >= 17/4`
`=> D = [17/4; +infty)`
`|x^2 - 4x - 5| = 4x - 17`
`=>` \(\left[ \begin{array}{l}x^2 - 4x - 5 = 4x - 17\\x^2 - 4x - 5 = 17 - 4x\end{array} \right.\)
`<=>` \(\left[ \begin{array}{l}x^2 - 8x + 12 = 0\\x^2 = 22\end{array} \right.\)
`<=>` \(\left[ \begin{array}{l}x = 6 (tm)\\x = 2 (l)\\x = \sqrt{22} (tm)\end{array} \right.\)
`=> S = {6; sqrt{22}}`