[tex]17 \times ( 17 {}^{3} - 17 {}^{2} \times 16 - 17 \times 16 - 16) = x[/tex]
[tex]17 \times (17 {}^{3} - 16 \times 17 {}^{2} - 272 - 16) = x[/tex]
[tex]17 \times (17 {}^{3} - 16 \times 17 {}^{2} - 288) = x [/tex]
[tex]17 {}^{4} - 16 \times 17 {}^{3} - 4896 = x[/tex]
[tex]83521 - 16 \times 17 {}^{3} - 4896 = x[/tex]
[tex]78625 - 16 \times 4996 = x[/tex]
[tex]78625 - 78608 = x[/tex]
[tex]17 = x[/tex]
[tex]x = 17[/tex]
