# 1/7 a^{3} - 2/√3 a^{2} + 4a - 7. Is the given expression a polynomial or not? Justify your answer

**Solution:**

It is given that

1/7 a^{3 }- 2/**√**3 a^{2 }+ 4a - 7

The power of a here is 3, 2 and 1 which are __whole numbers__.

Therefore, 1/7 a^{3 }- 2/**√**3 a^{2 }+ 4a - 7 is a __polynomial__.

**✦ Try This: **1/2 x^{3 }- 3/**√**2 x^{2 }+ 5x - 6. Is the given expression a polynomial or not? Justify your answer

It is given that

1/2 x^{3 }- 3/**√**2 x^{2 }+ 5x - 6

The power of a here is 3, 2 and 1 which are whole numbers.

Therefore, 1/2 x^{3 }- 3/**√**2 x^{2 }+ 5x - 6 is a polynomial.

**☛ Also Check: **NCERT Solutions for Class 9 Maths Chapter 2

**NCERT Exemplar Class 9 Maths Exercise 2.2 Problem 1(vii)**

## 1/7 a^{3} - 2/√3 a^{2} + 4a - 7. Is the given expression a polynomial or not? Justify your answer

**Summary:**

A polynomial expression has terms connected by the addition or subtraction operators. The expression 1/7 a^{3 }- 2/**√**3 a^{2 }+ 4a - 7 is a polynomial

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