Answer:
or 21.213
Step-by-step explanation:
For radical form: think of multiples of 450. Think of a pair that contains one perfect square, particularly the higher, the better . These 2 numbers are 25 and 18. 25 is the perfect square number since the two numbers that multiply to be 25 is 5 and 5.
Now take the perfect square of 25 and put it outside of the radical. The 18 remains inside: ![5\sqrt{18}](https://tex.z-dn.net/?f=5%5Csqrt%7B18%7D)
Now, since 18 is a high number that needs to get reduced, do the same for 18 as we did for 450--find two numbers, one of which is a perfect square. These two numbers are 9 and 2.
Now take the perfect square of 9. This is 3. Take it out of the radical so that only the two remains inside. The 3 will now multiply with the 5: ![5*3\sqrt{2}](https://tex.z-dn.net/?f=5%2A3%5Csqrt%7B2%7D)
Multiply 5 and 3 to get 15. The 15 stays outside the radical. Your answer is:
![15\sqrt{2}](https://tex.z-dn.net/?f=15%5Csqrt%7B2%7D)