Question

What does
Charge q1+q2=0 signify

Answer 1

It signifies that either one of them q1 or q2 has negative charge if the other has positive.
and it also states that the magnitude of charges q1 and q2 is same.

Answer 2

Hi friend,

The given statement implies that the charge q1 and q2 are equal in magnitude but it I was opposite in direction.

:-q1+q2 = o.

Hope this helped you a little!!!