Question

9. Find the cube root of (-2744).

Answer 1

So , the cube root of (-2744)

= 2x1372 

=2x2x686 

=2x2x2x343 

=2x2x2x7x49 

=2x2x2x7x7x7 

=2^3x7^3 

So cube root of 2744 is 2*7=14.
 
Proved by prime factorization.