Question

Which of the following is a factor of x3– 729?

x – 9

x + 9

x2+ 18x + 81

None of the above

Answer 1

find the cube root of 729 which is 9

so (x-9)(x^2+9x+81)

Answer 2

None of the above.

Answer 3

well x-9 is a factor

Answer 4

i believe it is just asking for one

Answer 5

Thts the only answer u will get if u factor it and the answer tht I got dosen't apply to any of the multiple choice above.
So tht's y it's none of the above.