1.

Which of the following expressions is a polynomial ?A) 3x-2 + 7x + 1B) 7x2 + 2/x – 8C) x2 – x – 1D) x +x/2 + 1/x

Answer»

Correct option is (C) x2 – x – 1

\(\because\) x - 2, \(\frac2x\) & \(\frac1x\) are rational expression (fractions) and polynomial are free from fractions.

\(\therefore\) These are not an example of polynomials.

Also, \(x^2-x-1\) is a polynomial because variables has natural powers.

C) x2 – x – 1



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