RS Aggarwal Class 9 Math Chapter 2 Polynomials Exercise 2A Solution

EXERCISE 2A

Question 1:
(i) It is a polynomial, Degree = 5.
(ii) It is polynomial, Degree = 3.
(iii) It is polynomial, Degree = 2.
(iv) It is not a polynomial.
(v) It is not a polynomial.
(vi) It is polynomial, Degree = 108.
(vii) It is not a polynomial.
(viii) It is a polynomial, Degree = 2.
(ix) It is not a polynomial.
(x) It is a polynomial, Degree = 0.
(xi) It is a polynomial, Degree = 0.
(xii) It is a polynomial, Degree = 2.

The degree of a polynomial in one variable is the highest power of the variable.

(i) Degree of 2x – \(\sqrt { 5 } \) is 1.
(ii) Degree of 3 – x + x2 – 6x3 is 3.
(iii) Degree of 9 is 0.
(iv) Degree of 8x4 – 36x + 5x7 is 7.
(v) Degree of x9 – x5 + 3x10 + 8 is 10.
(vi) Degree of 2 – 3x2 is 2.

Question 3:
(i) Coefficient of x3 in 2x + x2 – 5x3 + x4 is -5
(ii) Coefficient of x in
RS Aggarwal Solutions Class 9 Chapter 2 Polynomials Q3
(iii) Coefficient of x2 in RS Aggarwal Solutions Class 9 Chapter 2 Polynomials Q3.1
(iv) Coefficient of x2 in 3x – 5 is 0.

Question 4:
(i) x27 – 36
(ii) y16
(iii) 5x3 – 8x + 7

Question 5:
(i) It is a quadratic polynomial.
(ii) It is a cubic polynomial.
(iii) It is a quadratic polynomial.
(iv) It is a linear polynomial.
(v) It is a linear polynomial.
(vi) It is a cubic polynomial.