Algebra Practice Test 2026 – The Complete Guide to Mastering Your Exam Success!

The expression -√144 involves taking the square root of 144 and then applying a negative sign to the result.

First, we need to determine the value of √144. The square root of 144 is 12 since 12 × 12 = 144. Now, once we have calculated the square root, the negative sign in front of the square root indicates that we need to take the opposite of that value. Therefore, when we apply the negative sign, we get -12.

This leads us directly to the conclusion that the value of -√144 is indeed -12.