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Question
Difficulty Level:

Medium

MCQ

If f(x)=(7x−2)(5x−8)(x+5)(x−6)f(x)=(7 x-2)(5 x-8)(x+5)(x-6) has zeros at x=−5,x=27,x=85x=-5, x=\frac{2}{7}, x=\frac{8}{5} and x=6x=6.
What is the sign of ff on the interval −5<x<27-5< x < \frac{2}{7} ?

Select all that apply :

negative

positive

cannot say

positive

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