Question

Which expression is a difference of cubes?
x^6-6
x^6-8
x^8-6
x^8-8

Answer 1

This isnt math

Answer 2

oh wait

Answer 3

XD

Answer 4

what is it then?

Answer 5

im pretty sure it is...

Answer 6

NVM This isnt english XD XD XDDXDXDXDXD

Answer 7

Im sorry buddy. Hope someone helps you out :)

Answer 8

you have to be careful with this question
Remember when you multiply terms with exponents like x^2 you ADD the exponents.

Answer 9

example
x^2 * x^2 = x^(2+2) = x^4

Answer 10

yes i understand that bit but all and all im not understanding how to do this question

Answer 11

which of the numbers is a perfect cube 6 or 8 ?

Answer 12

6

Answer 13

no

Answer 14

2*2*2 is not 6

Answer 15

okay i see what you're saying now. then its 8, so how do i determine the rest?

Answer 16

You are now left with 2 choices x^6 or x^8
you now need to think of a term in x which when multiply by itself 3 times = x^6 or x^8

Answer 17

- this where where the rule of exponents comes in...

Answer 18

the answer should be x^6-8 right?

Answer 19

right
because x^2 * x^2 * x^2 = x^6

Answer 20

thank you!

Answer 21

or written another way (x^2)^3 = x^(2*3) = x^6

Answer 22

yw