SOLUTION: PLEASE HELP ME WITH THIS PROBLEM; For f(x)=1 over x62-2x-8 find the intervals where f(x)<0.

Algebra ->  Functions -> SOLUTION: PLEASE HELP ME WITH THIS PROBLEM; For f(x)=1 over x62-2x-8 find the intervals where f(x)<0.      Log On


   

Question 54624This question is from textbook ALGEBRA AND TRIGONOMETRY
: PLEASE HELP ME WITH THIS PROBLEM;
For f(x)=1 over x62-2x-8 find the intervals where f(x)<0. This question is from textbook ALGEBRA AND TRIGONOMETRY

Answer by venugopalramana(3286) About Me  (Show Source):
You can put this solution on YOUR website!
PLEASE HELP ME WITH THIS PROBLEM;
For f(x)=1 over x62-2x-8 find the intervals where f(x)<0.
HOPE YOU MEAN
Y = F(X)= X^2-2X-8.....ASSUMING SO
Y= X^2-4X+2X-8=X(X-4)+2(X-4)=(X+2)(X-4)
THE ROOTS ARE X=-2 AND X=4
FOR F(X) TO BE <0,X SHOULD LIE BETWEEN THE 2 ROOTS ..THAT IS ..BETWEEN -2 & 4 .
-2