English Medium Class 9 - CBSE Question Bank Solutions for Mathematics

Write the coefficient of x² in the following:

(2x – 5)(2x² – 3x + 1)

Give an example of a polynomial, which is monomial of degree 1.

Give an example of a polynomial, which is binomial of degree 20.

Give an example of a polynomial, which is trinomial of degree 2.

Find the value of the polynomial 3x³ – 4x² + 7x – 5, when x = 3 and also when x = –3.

If p(x) = x² – 4x + 3, then evaluate : `p(2) - p(–1) + p(1/2)`

Using suitable identity, evaluate the following:

103³

Using suitable identity, evaluate the following:

101 × 102

Using suitable identity, evaluate the following:

999²

Factorise the following: 

4x² + 20x + 25

Factorise the following:

9y² – 66yz + 121z²

Factorise the following:

`(2x + 1/3)^2 - (x - 1/2)^2`

Expand the following:

(4a – b + 2c)² 

Expand the following:

(3a – 5b – c)² 

Expand the following:

(–x + 2y – 3z)²

Factorise the following:

9x² + 4y² + 16z² + 12xy – 16yz – 24xz

Factorise the following:

25x² + 16y² + 4z² – 40xy + 16yz – 20xz

Factorise the following:

16x² + 4y² + 9z² – 16xy – 12yz + 24xz

If a + b + c = 9 and ab + bc + ca = 26, find a² + b² + c².

Expand the following:

(3a – 2b)³