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1. Find the value of the polynomial \(5x-4x^2+3\) at

(i) x=0

(ii) x=-1       

(iii) x=2

Polynomials

Exercise 2.2

Ncert solutions class 9 chapter 2 exercise 2 question 1
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Class 9

Polynomials

Exercise 2.2

1. Find the value of the polynomial \(5x-4x^2+3\) at

(i) x=0

(ii) x=-1       

(iii) x=2

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

(i) \(p(y)=y^2-y+1\) 

(ii) \(p(t)=2+t+2t^2-t^3\)

(iii) \(p(x)=x^3\)

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

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

(i) \(p(x)=3x+1\), \(x=-{1\over 3}\)

(ii) \(p(x)=5x-\pi\), \(x={4\over 5}\)               

(iii) \(p(x)=x^2-1\), \(x=1, -1\)

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

(v) \(p(x)=x^2\), \(x=0\)

(vi) \(p(x)=lx+m\), \(x=-{m\over l}\)

(vii) \(p(x)=3x^2-1\), \(x=-{1\over{\sqrt 3}},{2\over {\sqrt 3}}\)

(viii) \(p(x)=2x+1\), \(x={1\over 2}\)

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.