Question

Using complete sentences, explain how you would factor completely x^9 –27

Answer 1

you can use the identity
a^3 - b^3 = (a - b)(a^
- can't remember it - ill recheck

Answer 2

a^3 - b^3 = (a-b)(a^2 + ab + b^2) is what you're looking for cwrw238

Answer 3

thats it - thanx lol

Answer 4

you're welcome

Answer 5

so put a = x^3 and b = 3
into Jim's formula

Answer 6

(x^3)^3 - 3^3 = (x^3 - 3)(x^3)^2 + 3x^3 + 3^2)
= (x^3 - 3)(x^6 + 3x^3 + 9)

Answer 7

x^9 –27=0
...firstly u take 27 to the right and u will get
x^9 =27
then apply the 9th root both sides u will get
x=\[\sqrt[9]{27}\]
then
x = (27)^(1/9)
x=(3^3)^(1/9)
x=3^(1/3)
=\[\sqrt[3]{3}\]
........so ....u can use a calculator 2 find the answer if uwant 2 go further .....but it is not important