Posted by justin on .
I was wondering what the answer to this is.
(x7)3 3 means it is cubed
i workedit out but i was wondering what it might be.

algebra 
Reiny,
(x7)^3
= (x7)(x7)(x7)
= (x7)(x^2  14x + 49)
= x^3  14x^2 + 49x  7x^2 + 98x  343
= x^3  21x^2 + 147x  343