I like your solution, just use strings.Builder instead concatenaning strings

Solving the task on typescript, I had the same problem, but I solved it.
The problem concerns the test that follows the test that you are looking at, with the data
a1 = [3,4];
a2 = [0.25];

revise your solution algorithm, and deal with the output of debug information

Date: Feb 5 2020
One of the test is wrong!
Go v1.12

INPUT:
[11, 19, 19, 19, 121, 144, 144, 161]
[121, 361, 361, 14641, 20736, 20736, 25921, 36100]
r: false ;

Expected: true
to equal: false