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NCERT SOLUTIONS CLASS 9 MATHEMATICS

Exercise 2.2

Q.1. Find the value of the polynomial at 5x + 4x2 + 3 at

(i) x = 0 (ii) x = - 1 (iii) x = 2

Q.2. Find p(0), p(1) and p(2) for each of the following polynomials:

(i) p(y) = y2 - y + 1

(ii) p(t) = 2 + t + 2t2 - t3

(iii) p(x) = x3

(iv) p(x) = (x - 1) (x + 1)

Q.3. Verify whether the following are zeroes of the polynomial, indicated against them.

(i) p(x) = 3x + 1, x = - 13

(ii)  p(x) = 5x - π, x = 45

(iii) p(x) = x2 - 1, x = 1, -1

(iv) p(x) = (x + 1) (x - 2), x = -1, 2

(v) p(x) = x2 , x = 0

(vi) p(x) = lx + m, x = - ml

(vii) p(x) = 3x2 - 1, x = - 13,23

(viii) p(x) = 2x + 1, x = 12

Q.4. Find the zero of the polynomial in each of the following cases:

(i) p(x) = x + 5 

(ii) p(x) = x - 5 

(iii) p(x) = 2x + 5

(iv) p(x) = 3x - 2 

(v) p(x) = 3x 

(vi) p(x) = ax, a ≠ 0

(vii) p(x) = cx + d, c ≠ 0, c, d are real numbers.