



 
You don't, it's already as simple as it gets. You can expand it, to get x^{3}  12 x^{2} + 48x  64. The opposite operation is "factoring". Neither is necessarily considered to be simplification. "Simplifying" would refer to cancelling, combining common terms, etc. as in x^{3}  2x^{3} + 5x^{3} > 4x^{3} Good Hunting!  


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