Problem 13: Simplify the radical expression. Use absolute value symbols when

needed. Feel free to use sqrt( ) to indicate the radical.
9x
4
36

To simplify the radical expression of 9x^4/36, we can first simplify the fraction to 9x^4 = (3x^2)^2. Then we know that the square root of 36 is 6.

Therefore, the simplified expression is:

|3x^2| / 6 = 3|x|/6 = |x|/2.