Let f(x) = ((x-3)(x+2)(x+5))/((x+1)(x-7)). Find the intervals where f(x) is positive or negative. i found out the answer in your website but my teacher told me that it was wrong can u please tell me another method

it will be +ve in (-1,7)U(7,+∞)

and -ve in (-∞,-1)

the answer or the interval is

(-5,-2)U(-1,3)U(7,infinity)

to my knowlegde that should be the right answer.if it is not then can u justify or tell me ur answer

check it in the study material of this website .....http://www.askiitians.com/iit-jee-algebra/set-relations-functions/inequalities.aspx

and plzzzz i asked for a method not answer everyone has answers for their problems not solution ...booo hhuuuu