This is a question that I had a brain fart on and sought out to be more tricky than what it really was.
Since I had been looking at questions that looked more like these two questions below, I was exposed to something new.
It was soon after that when I realised that, the way you figure out this question is the same as the other two types of questions above. So… like the two questions above I would write down all the perfect cubes up to ten for the first one and then perfect squares up to ten for the second question. Wheras for this question I would write out all of the perfect fours up to ten, although I’m pretty sure you won’t need to do it all the way up to ten every single time but it’s still very useful. By doing this step your life will become a lot more efficient when it comes to radicals.
The next step is to look at your question and then look at your chart to see if any of them match up.
And there you go question solved, because the two numbers from the radical matched with the two numbers on the chart.
Tips for the future:
* The chart will make your life soo much easier if you continue to use it, and the more you use it the more you will start to memorize the chart in your head.
* This example applies to any other number taking up the space as your index in your question. It doesn’t matter what number the same rules apply.