Class 9

Q1. Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer.(i) 4x2–3x+7Ans: The equation 4x2–3x+7 can be written […]

Q1. Determine which of the following polynomials has (x + 1) a factor:(i) x3 + x2 + x + 1Ans: Let p(x) = x3 + x2 + x + 1The zero […]

Q1: Use suitable identities to find the following products: (i) (x + 4)(x + 10) Ans: Using the identity (x + a)(x + b) = x2 + (a + […]

Exercise 3.1 Q1. How will you describe the position of a table lamp on your study table to another person?Ans: The above figure is a 3-D […]

Exercise 4.1 Q1. The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement. […]

Q1: Which of the following statements are true and which are false? Give reasons for your answers.(i) Only one line can pass through a single point.(ii) […]

Table of contents Exercise 11.1 Q1. Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved […]

Q1. A survey conducted by an organisation for the cause of illness and death among the women between the ages 15–44 (in years) worldwide, found the […]

Exercise 6.1 Q1. In Fig. 6.13, lines AB and CD intersect at O. If ∠AOC +∠BOE = 70° and ∠BOD = 40°, find ∠BOE and reflex […]