# Factored Form

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• July 7th 2010, 05:44 AM
Glitch
Factored Form
Hey guys,

I'm having trouble factorising this following:

8x^6 + 64

I've done the following:

8(x^6 + 8)

I'm not sure how to factorise this further. Please provide detailed steps so I can understand. Thank you.
• July 7th 2010, 05:50 AM
Prove It
Use the sum of two cubes rule

$a^3 + b^3 = (a + b)(a^2 - ab + b^2)$.

In your case, $8(x^6 + 8) = 8[(x^2)^3 + 3^3]$.
• July 7th 2010, 05:52 AM
Glitch
Thank you so much! I've been struggling with math, and any help is greatly appreciated!