Question

Choose the correct simplification of the expression (7ab3)2.

49ab6

49a2b5

49a2b6

14a2b6

Answer 1

The correct answer is the third one - 49 a^2 b^6.

Explanation:

Answer 2

You can use this equation to help you: (ab)^2 = a^2 b^2. And also (a^m)^n = a^m*n

So, here it is:

(7ab^3)^2 = 7^2 a^2 b^3*2 = 49a^2b^6

The correct answer is the third one - 49 a^2 b^6.