Question

90×90=8100
94×94=8836
95×95=9025
Check which is nearest to the given number
9025 is nearest to 8902
Find the difference
9025-8902=123
Therefore
If we add 123 to 8902 become perfect square

Answer 1

yes it is right answer

Answer 2

You practically did the whole thing, so I can only say.............


HENCE PROVED!