Question

The expression in one variable is 

x+x2 +1 

x+y 

x+9y 

xyz

​

Answer 1

Answer:

x+x2 +1

Step-by-step explanation:

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Answer 2

Answer:

x+x2+1

Step-by-step explanation:

x and y are two variables ,so the option which has only one x or y is one variable..so the option a is correct.