Can someone explain how to simply radicals in these problems? asap and you

In the image below, I showed my work. What you basically do is find the greatest perfect square in each variable and you pull it out of the radical.

there are 70 more legs than eyes at the dog show (196 – 126 = 70). dogs have two more legs than eyes, and humans have the same number of legs as eyes. thus 70 is twice the number of dogs at the show, so the number of dogs is half of 70, which is 35. to get the number of humans, subtract 35 from 63: 63 – 35 = 28.

step-by-step explanation:

look at photo