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Question

Which of the following expressions are polynomials?
(i) x2+4
(ii) 4x1
(iii) 2x22x



A

i, ii, iii

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B

i

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C

ii, iii

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D

iii

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Solution

The correct option is B

i


Polynomials cannot have variables with exponents as negative integers.
Hence, 
4x1 and 2x22x are not polynomials as the variable 'x' has (-1) as the exponent.

x2+4 has the variable x, the power of the variable is a positive integer 2 , a constant term 4 and the operator '+'.
Hence, x2+4 is a polynomial. 


Mathematics

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