Question

Find the cube-root of -216 x 1728

Answer 1

-216 x 1728

2	216
2	108
2	54
3	27
3	9
3	3
	1

 

 

 

 

 

 

 

 

2	1728
2	864
2	432
	216

 

 

 

 

= -(2 x 2 x 2 x 3 x 3 x 3) x (2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3)
= -2 x 3 x 2 x 2 x 3
= -72