1/5x^-2 + 5x + 7. Is the given expression a polynomial or not? Justify your answer

Solution:

It is given that

1/5x^-2 + 5x + 7

We can write it as

x²/5 + 5x + 7

The power of x here is 2 and 1 which is a whole number

Therefore, 1/5x^-2 + 5x + 7 is a polynomial.

✦ Try This: 1/6x^-2 + 6x + 8. Is the given expression a polynomial or not? Justify your answer

It is given that

1/6x^-2 + 6x + 8

We can write it as

x²/6 + 6x + 8

The power of x here is 2 and 1 which is a whole number

Therefore, 1/6x^-2 + 6x + 8 is a polynomial.

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

NCERT Exemplar Class 9 Maths Exercise 2.2 Problem 1(iv)

1/5x^-2 + 5x + 7. Is the given expression a polynomial or not? Justify your answer

Summary:

Polynomials with 2 as the degree of the polynomial are called quadratic polynomials. The expression 1/5x^-2 + 5x + 7 is a polynomial

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