What is (2b)^3 where b=3?

1 Answer
Dec 16, 2016

216

Explanation:

2b means 2xxb.

Note that (2b)^3 and 2b^3 are different. In the first case, the power, 3 is applied to the multiple of 2 and b, whereas in the second case, the power is applied to b only.

Coming back to the question,

(2b)^3 = (2xx3)^3 = 6^3 = 6xx6xx6 = 216