anonymous
  • anonymous
Which expression is a difference of cubes? x^6-6 x^6-8 x^8-6 x^8-8
Mathematics
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anonymous
  • anonymous
Which expression is a difference of cubes? x^6-6 x^6-8 x^8-6 x^8-8
Mathematics
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
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anonymous
  • anonymous
This isnt math
anonymous
  • anonymous
oh wait
anonymous
  • anonymous
XD

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welshfella
  • welshfella
what is it then?
anonymous
  • anonymous
im pretty sure it is...
anonymous
  • anonymous
NVM This isnt english XD XD XDDXDXDXDXD
anonymous
  • anonymous
Im sorry buddy. Hope someone helps you out :)
welshfella
  • welshfella
you have to be careful with this question Remember when you multiply terms with exponents like x^2 you ADD the exponents.
welshfella
  • welshfella
example x^2 * x^2 = x^(2+2) = x^4
anonymous
  • anonymous
yes i understand that bit but all and all im not understanding how to do this question
welshfella
  • welshfella
which of the numbers is a perfect cube 6 or 8 ?
anonymous
  • anonymous
6
welshfella
  • welshfella
no
welshfella
  • welshfella
2*2*2 is not 6
anonymous
  • anonymous
okay i see what you're saying now. then its 8, so how do i determine the rest?
welshfella
  • welshfella
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
welshfella
  • welshfella
- this where where the rule of exponents comes in...
anonymous
  • anonymous
the answer should be x^6-8 right?
welshfella
  • welshfella
right because x^2 * x^2 * x^2 = x^6
anonymous
  • anonymous
thank you!
welshfella
  • welshfella
or written another way (x^2)^3 = x^(2*3) = x^6
welshfella
  • welshfella
yw

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