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Simplify the expression (x+8)^3

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1 Answer

Hi Joshlyn,
 
To answer this question, you have to remember that you can't distribute a power the same way you can distribute multiplication and division. So (x+8)3 is the same as (x+8)(x+8)(x+8).
 
Then you multiply it out, and it looks like
 
x3+8x2+8x2+64x+8x2+64x+512
 
You do this by multiplying each of the numbers in each binomial by each of the other numbers, so first you do x*x*x, then x*x*8, then x*8*x, and so on.
 
Simplified, this looks like
 
x3+32x2+128x+512
 
 
Hope this helped!
 
 
 

Comments

Thank you so much Emily! I had the concept down just couldn't get my mind to get started! But again, thank you so much!!