exam Maths Puzzle Numerical Ability

kanchan receives a certain amount of money on her retirement from her employer she give half of this money & an additional sum of Rs.10000/- to her daughter. she also gives one thi

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Homework question. Please help. thanks

w^2+2w/w^2-9 divided by w^2+7w+10/w^2+8w+15 For f(x) = 1/x^2 -2x -8, find the interval(s) where f(x) < 0.

possible answers:
(-4,2)
(-2,4)
(2,4)
(2,8)

Pleeze show me. Thank you.