Confusion about meaning of this question. High school Algebra level.
The product of two numbers is 10. One of them is $a$. Express their sum in
terms of $a$.
The factors of 10 are 1,2,5,10. Thus $a \in {1,2,5,10}$ Thus the sum can
be either 7 or 11.
Now how does one express the sum in terms of $a$?
How do I express the non-$a$ factor?
I can only think of $a + 10/a$. But that seems too simple, and I feel like
I am not understanding the question correctly.
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