Question

what does this mean​

Answer 1

Answer:

this sign indicates that their is a mistake in the number which can be solved by either adding or subtracting given amount of number from it.

Answer 2

Answer:

it means it can be positive and negative also.

it usually used with underroot value

jab kisi ka square root nikalte hai to ISS sign ka use Kiya jayata

Step-by-step explanation:

✓121=+-11

✓121=-11or+11