# CBSE Class 9th Math 2 – Polynomials MCQs

#### The polynomial x2 is a ____.

Correct! Wrong!

The polynomial consisting of one term is known as a monomial. Hence, x2 is monomial.

#### The polynomial 3x3 + 4x2+ 5x - 7____.

Correct! Wrong!

Given polynomial is 3x3 + 4x2+ 5x – 7. The degree of the polynomial is 3. A polynomial of degree 3 is known as a cubic polynomial. Hence, the polynomial 3x3 + 4x2+ 5x – 7 is a cubic polynomial.

#### If p(x) = x2 + x +1 and q(x) = x2 - x +1, then p(x) q(x) = ____.

Correct! Wrong!

Given polynomials are p(x) = x2 + x +1 and q(x) = x2 - x +1. p(x) q(x) = (x2 + x +1)( x2 - x +1) x2 (x2 + x +1) - x(x2 + x +1) + (x2 + x +1) x4 + x3 + x2 - x3 - x2 – x + x2 + x + 1 x4 + x2 + 1 p(x) q(x) = x4 + x2 + 1

#### Which of the following is 35th degree binomial?

Correct! Wrong!

The 35th degree is x35 + 4x

#### The degree of 7x2 + 8x8 –2x is ____.

Correct! Wrong!

The highest power of a term of a polynomial is its degree. Hence, the degree of 7x2 + 8x8 – 2x is 8

#### If f(x) = x3 – 6x2+ 11x – 6, then the value of f(x) at x = 1 is

Correct! Wrong!

Given polynomial is x3 – 6x2+ 11x – 6. f(x) = (1)2+ 11(1) – 6 = 1 – 6 + 11 – 6 = 12 – 12 = 0 Hence, the value of f(x) at x = 1 is 0.

#### The coefficient of x2 in π/2 x2 + x is ____.

Correct! Wrong!

The coefficient of x2 in π/2 x2 + x is π/2

#### The degree of 5 x2 – 3x + 4

Correct! Wrong!

The highest power of a term of a polynomial is its degree. Hence, The degree of 5 x2– 3x + 4 is 2

#### The zero of the polynomial p(x) = x - 5

Correct! Wrong!

Given polynomial is p(x) = x – 5 The zero of a polynomial is the value of x that makes the polynomial equal to 0. P(x) = 0 ⇒ x - 5 = 0 ⇒ x = 5 Hence, the zero of the polynomial p(x) = x – 5 is 5

#### If f(x) = 2x3 – 132+ 17x + 12, then the value of f(x) at x = -3 is ____.

Correct! Wrong!

Given polynomial is f(x) = 2x3 – 132+ 17x + 12. f(-3) = 2(-3)3+ 17(-3) + 12 = -54 – 117 – 51 + 12 = -210 Hence, the value of f(x) at x = -3 is -210.

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