NCERT Mathematics Class 9 Exemplar Ch 2 Polynomials Part 7
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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