### Home > APCALC > Chapter 1 > Lesson 1.2.4 > Problem1-72

1-72.

Helen thinks $\sqrt { x ^ { 2 } }$ = x. Felicia does not agree. Homework Help ✎

1. Use various values of x to check whether or not Helen is correct.

Try evaluating different numbers. Be sure to include positive numbers, negative numbers and fractions.

2. Write an accurate expression for $\sqrt { x ^ { 2 } }$.

If both n and −n give you the same value, n, how can we alter Helen's statement to make it true?