NCERT Mathematics Class 9 Exemplar Ch 2 Polynomials Part 7 (For CBSE, ICSE, IAS, NET, NRA 2023)

Doorsteptutor material for CBSE/Class-9 is prepared by world's top subject experts: get questions, notes, tests, video lectures and more- for all subjects of CBSE/Class-9.

Q. 24. Factorise:

(i)

(ii)

(iii) (iv)

Answer: (i)

(ii)

(iii)

(iv)

Q. 25. Using suitable identity, evaluate the following:

(i)

(ii)

(iii) 9992

Answer: (i) , (ii) , (iii)

Q. 26. Factorise the following:

(i)

(ii)

(iii)

Answer: (i) , (ii) , (iii)

Q. 27. Factorise the following:

(i)

(ii)

Answer: (i) , (ii)

Q. 28. Expand the following:

(i)

(ii)

(iii)

Answer: (i) (ii) (iii)

Q. 29. Factorise the following:

(i)

(ii)

(iii)

Answer: (i) ,

(ii)

(iii)

Q. 30. If and , find .

Answer: 29

Q. 31. Expand the following: (i) (ii) (iii)

Answer: (i) (ii)

(iii)

Q. 32. Factorise the following:

(i)

(ii)

Answer: (i)

(ii)

Q. 33. Find the following products:

(i)

(ii)

Answer: (i)

(ii)

Q. 34. Factorise: (i)

(ii)

Answer: (i)

(ii)

Q. 35. Find the following product:

Answer:

Q. 36. Factorise: (i)

(ii) .

Answer: .

(i)

(ii)

Q. 37. Without actually calculating the cubes, fined the value of:

(i)

(ii)

Answer: (i)

(ii)

Q. 38. Without finding the cubes, factorise

Answer:

Q. 39. Find the value of (i) , when

(ii) , when

Answer: (i) 0 (ii) 0

Q. 40. Give possible expressions for the length and breadth of the rectangle whose area is given by

Answer: One possible answer is: Length , Breadth