Question

12. If 4x² – 6x – m is divisible by x – 3, the value of m is exact divisor of

(a) 9

(b) 45

(c) 20

(d) 36

13. If one zero of the polynomial x² -6 x+ 4 is 3 + √5, write the other zero.

14. If one factor of x3 + 7kx² – 4kx + 12 is (x + 3), Find the value of k.

15. If x3 + x² – ax + b is divisible by x² – x, write the values of a and b.

16. If the zeroes of the quadratic polynomial x² + (a + 1) x + b are 2 and -3, then [NCERT Exemplar Problem, CBSE 2011]

(a) a = -7, b = -1

(b) a = 5, b = -1

(c) a = 2, b = -6

(d) a = 0, b = -6

17. The zeroes of the quadratic polynomial ax² – b are

(a) both negative

(b) one positive and one negative

(c) both positive

(d) both equal

18. The zeroes of the quadratic polynomial p² – qx + r are

(a) both negative

(b) one positive and one negative

(c) both positive and unequal

(d) both equal and positive

19. If one of the zeroes of the cubic polynomial x3 + ax² + bx + c is -1, then the product of the

other two zeroes is

(a) b – a + 1

(b) b – a – 1

(c) a – b + 1

(d) a – b – 1

20. What is the sum of zeroes of quadratic polynomial p(x) = ax (p + x) + b has/have:

(a) p/a

(b) a/p

(c) 1/p

(d) -p​

Answer 1

Answer:

12.a) 9

20.a) p/a

Step-by-step explanation:

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