If k³ =
1x2x4+2x4x8+3x6x12+...
+ 100 x 200 × 400/
1x3x9+2x6x18+ 3x9x27+...
+ 100 x 300 x 900
(x - 3k) is a factor of the polynomial p(x) = x² +
ax-4, then the value of a is