  CBSE Class 9 Polynomials MCQ New

## CBSE Class 9 Polynomials MCQ By Clarify Knowledge

CBSE Class 9 Polynomials MCQ New Pattern 2022

## CBSE Class 9 Polynomials MCQ Table

1) x2-2x+1 is a polynomial in:

a. One Variable

b. Two Variables

c. Three variable

d. None of the above

Explanation: x2-2x+1 can be written as x2-2x1+1x0. Hence, we can see that x is the only variable having powers as whole numbers: 2,1 and 0.

2) The coefficient of x2 in 3x3+2x2-x+1 is:

a. 1

b. 2

c. 3

d. -1

Explanation: The coefficient of x2 in equation 3x3+2x2-x+1 is the multiple of x2.

3) A binomial of degree 20 in the following is:

a. 20x + 1

b. x/20 + 1

c. x20 +1

d. x2+20

Explanation: A polynomial having two terms and the highest degree 20 is called a binomial of degree 20.

4) The degree of 4x3-12x2+3x+9 is

a. 0

b. 1

c. 2

d. 3

Explanation: The degree is the highest power of a variable in an equation.

5) x2 – x is ________ polynomial.

a. Linear

c. Cubic

d. None of the above

Explanation: A polynomial of degree two is known as a quadratic polynomial.

6) x – x3 is a ________ polynomial.

a. Linear

c. Cubic

d. None of the above

Explanation: A polynomial of degree three is known as a cubic polynomial.

7) 1+3x is a _________ polynomial.

a. Linear

c. Cubic

d. None of the above

Explanation: A polynomial of degree one is known as a linear polynomial.

8) The value of f(x) = 5x−4x2+3 when x = -1, is:

a. 3

b. -12

c. -6

d. 6

Explanation: When x= -1

f(x)=5x−4x2+3

f(−1)=5(−1) −4(−1)2+3

=−5–4+3

=−6

9) The value of p(t) = 2+t+2t2−t3 when t=0 is

a. 2

b. 1

c. 4

d. 0

Explanation: p(0)=2+0+2(0)2–(0)3=2

10) The zero of the polynomial f(x) = 2x+7 is

a. 2/7

b. -2/7

c. 7/2

d. -7/2

Explanation: f(x)=2x+7

⇒2x+7=0

⇒2x=−7

⇒x=−7/2

∴x = −7/2 is a zero polynomial of the polynomial f(x).

11) What is the degree of the polynomial √3?

a. 0

b. 1

c. 1/2

d. 2

Explanation: The polynomial √3 can also be written as 31/2.

Hence, the degree of the polynomial √3 is 1/2.

12) The degree of the constant polynomial is

a. 0

b. 1

c. 2

d. 3

Explanation: The degree of the constant polynomial is 0. For example, 3 is a constant polynomial that is equal to 3x0, and its degree is 0.

13) One of the linear factors of 3x2+8x+5 is

a. (x+1)

b. (x-2)

c. (x+2)

d. (x-4)

Explanation: 3x2+8x+5 = 3x2+ 3x+5x+5

3x2+8x+5 = 3x(x+1)+5(x+1)

3x2+8x+5 = (3x+5)(x+1)

Therefore, (x+1) is one of the factors of 3x2+8x+5.

14) The coefficient of x in 7x2+6x-2 is

a. 2

b. 6

c. -2

d. 7

Explanation: The coefficient of x in 7x2+6x-2 is 6. Because the number multiplied by x is 6.

15) Which of the following is an example of the quadratic polynomial?

a. 7x+3

b. 2x2+x-1

c. x+3x3-9

d. None of the above