I can't make it work with the square root of 21? It's just 3x7 so no pair of numbers?? Or am I missing something??? Or is 21 prime maybe???!!!!! Thats probably it???!!!
3 and 7 are each prime. Your answer would have to be: (square root of 3)(square root of 7) Or it might make more sense to leave it as square root of 21. I guess it depends on what you’re trying to do with it.
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Isn't this just taking whatever you grab out of the radical and dividing the inside by it twice?
No 3x7=21 so its not prime??? Or???? I'm confused now......???
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I can't make it work with the square root of 21? It's just 3x7 so no pair of numbers?? Or am I missing something??? Or is 21 prime maybe???!!!!! Thats probably it???!!!
3 and 7 are each prime. Your answer would have to be: (square root of 3)(square root of 7)
Or it might make more sense to leave it as square root of 21. I guess it depends on what you’re trying to do with it.
The square root of 21 can’t be simplified any further, so the answer would just be "square root of 21"
We call them SURDS in the UK.