Question

The square of a whole number is 2809 what is the number

Answer 1

x= is the number; then we have the next equation:
x²=2809
x=⁺₋√2809=⁺₋53

We have two solutions: the number can be -53 and 53.

Answer: the number can be -53 and the number can be 53 too.

We check it out.
(-53)²=2809
53²=2809

Answer 2

the square of 2809 is 53.