Question

# The roots of the equation x2+2(a−3)x+9=0 lies between -6 and 1  then [ a ] =________ , where [.] denotes greatest integer function x.

A

3

B

6

C

12

D

19

Solution

## The correct option is A 6 △ ≥ 0 , f(-6) > 0 , f(1) > 0 , -6 < α+β2 < 1  ⇒ [a] = 6 Mathematics

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