Question

FOIL method (x^3-9)(2x^3-1)

Answer 1

(x^3-9)(2x^3-1)

(x^3)(2x^3)+(x^3)(-1)+(-9)(2x^3)+(-9)(-1)

2x^6-x^3-18x^3+9

2x^6-19x^3+9

So \[\large (x^3-9)(2x^3-1)=2x^6-19x^3+9\]

Answer 2

foil? nah, just multiply like always ...

x^3 -9
2x^3-1
--------
2x^6 -18x^3
-x^3 +9
----------------
2x^6 -19x^3 +9 :)