Question 1037704: √21x for which value should x be further simplified a. 5 b. 8 c. 37 d. 54? I do not know how to slove these types of problems
Answer by solver91311(24713)   (Show Source):
You can put this solution on YOUR website!
I don't know how to "slove"[sic] these kinds of problems either. I don't know how to "slove" any kind of problem. I know how to solve problems where you have a mathematical expression that contains a relational operator, but that is not the case here. Therefore, solve, despite the fact that it is actually an English word, is not the correct word. However, I think I can help you answer this question.
An expression such as  can be simplified if the prime factorization of  contains any pairs of prime factors.
Note that  has 3 factors, namely  ,  , and  . If were replaced by  or  , both of which are prime and neither of which pairs either of the two factors of  , then there is no simplification that can be done. However, the same cannot be said of the other two choices. This problem has two correct answers, b and d.
John
My calculator said it, I believe it, that settles it
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