NCERT Mathematics Class 9 Exemplar Ch 2 Polynomials Part 3

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15. The value of is

(A)

(B) 477

(C) 487

(D) 497

Answer: D

16. The factorisation of is

(A)

(B)

(C)

(D)

Answer: B

17. Which of the following is a factor of?

(A)

(B)

(C)

(D)

Answer: D

18. The coefficient of x in the expansion of is

(A) 1

(B) 9

(C) 18

(D) 27

Answer: D

19. If, the value of is

(A) 1

(B) –1

(C) 0

(D)

Answer: C

20. If , then the value of b is

(A) 0

(B)

(C)

(D)

Answer: C

21. If , then is equal to

(A) 0

(B) abc

(C) 3abc

(D) 2abc

Answer: C