which of the expressions doe not contain any like terms?    a. 2x2+3x-4x+2     b. xy+yz-17     c. x2+x2-2x-x2   d. 4+8+y

Answer :

b. does not contain any like terms, because xy, yz, and -17, do not share any common variables. 

Hope this helps!
The answer is B it does not have any of the other terms

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