I understand that you may be struggling with understanding how to evaluate a square root expression with a negative number under the square root. Let me explain it further:
A square root is a mathematical operation that returns the value of a number that, when multiplied by itself, equals the original number. For example, √4 = 2 because 2*2 = 4. However, when you try to take the square root of a negative number, it is not possible to get a real number. Therefore, the square root of a negative number is represented by the imaginary number "i" which is defined as the square root of -1. So, √(-98x5) = √(98x5)i
Please let me know if there's anything else I can help you with.