Following expressions are polynomials? Justify your answer: frac{1}{7} a^{3}-frac{2}{√{3}} a^{2}+4

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2. Polynomials

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The following expressions are polynomials? Justify your answer:

$\frac{1}{7} a^{3}-\frac{2}{\sqrt{3}} a^{2}+4 a-7$

Option A

Option B

Option C

Option D

Solution

$\frac{1}{7} a^{3}-\frac{2}{\sqrt{3}} a^{2}+4 a-7$

In this expression, the exponent of a in each term is a whole number, so this expression is a polynomial.

Standard 9

Mathematics

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