The square of either of the digits of either number minus th

The square of either of the digits of either number, minus the product of both digits, square of the other digit is the number 21. The numbers are ?

Solution

Please see going through the options we can see only numbers 45,54 satisfies the test

4^2 - 4 * 5 + 5^2 = 21

Also, if you check 5^2 - 5*4 + 4^2 = 21

so 45,54 is our final answer !!:)