Question

how you would factor completely x^9 –27??

Answer 1

do you know how to factor \(a^3-b^3\)?

Answer 2

are those cubed?

Answer 3

yes

Answer 4

would it be (x^3-3)(x^6+3x^3+9)

Answer 5

I really don't know how to do the difference of cubes

Answer 6

\[a^3-b^3=(a-b)(a^2+ab+b^2)\]

Answer 7

rewrite your expression as the difference to two cubes and it should become clear what to do next

Answer 8

oh!! and 27 is actually 3^3!!!

Answer 9

bingo! well done! :)

Answer 10

thank you!!

Answer 11

yw :)