SOLUTION: Negative x cubed minus 343

Algebra ->  Exponents -> SOLUTION: Negative x cubed minus 343      Log On


   

Question 818685: Negative x cubed minus 343
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
I'm assuming you want to factor.

-x^3 - 343

-(x^3 + 343)

-(x^3 + 7^3)

-(x + 7)(x^2 - 7x + 7^2) ... use the sum of cubes factoring rule

-(x + 7)(x^2 - 7x + 49)