Question

Evaluate the expression, if possible: √ –25

A. Not a real number
B. 25
C. 5
D. –5

Answer 1

When a negative sign is under the square root, we are unable to get real numbers back after taking the root.

Thus, the square root of -25 is not a real number (choice A).

Answer 2

The square root of a negative number considered an imaginary number. This means it is not a real number.

The answer is A.