Answer:
Step-by-step explanation:
Start by "taking out" the perfect squares. 25 and 9 are perfect squares (and pretty common ones).
The square root of 25 is 5 and the square root of 9 is 3. Therefore you can take out a 5 and 3 from the radical. Multiply the numbers you take out together.
5 * 3 = 15
The number outside of the radical sign will be a 15, and x is left over inside the radical. The final answer is .