Hello :
<span>C.) (4 · 4) – (4 ÷ 4) =16-1=15</span>
7v3 is the radical simplified... to do this you can use multiple methods. I like to use a factor tree.
Here’s a link to a website that explains some different methods of solving:
http://m.moomoomath.com/?url=http://www%2emoomoomath%2ecom%2fsimplyfing%2dradicals%2ehtml#2653
