Final answer:
The negative square root of 25/64 is -5/8. This is calculated by taking the square root of both the numerator (25) and the denominator (64), resulting in 5 and 8 respectively, then attaching a negative sign to the result.
Step-by-step explanation:
To find the negative square root of a fraction, you first need to take the square root of both the numerator and the denominator. In this case, the numerator is 25 and the denominator is 64.
The square root of 25 is 5 and the square root of 64 is 8.
Therefore, the square root of 25 / 64 is 5 / 8. But the question asks for the negative square root, so the answer would be -5/8.
Learn more about Negative Square Root