SOLUTION: Suppose f(x)=(x−2)(x+9). (a) For which values of x is the function f(x) positive? Enter your answer using inequalities. (b) For which values of x is the function f(x)

Question 901151: Suppose f(x)=(x−2)(x+9).
(a) For which values of x is the function f(x) positive? Enter your answer using inequalities.
(b) For which values of x is the function f(x) negative? Enter your answer using inequalities.
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
The roots are the critical x values.

Check in the intervals of x, , , and .

Recognize that f(x) is a parabola with positive coefficient on . f will be positive for and for .
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SOLUTION: Suppose f(x)=(x&#8722;2)(x+9). (a) For which values of x is the function f(x) positive? Enter your answer using inequalities. (b) For which values of x is the function f(x)

SOLUTION: Suppose f(x)=(x−2)(x+9). (a) For which values of x is the function f(x) positive? Enter your answer using inequalities. (b) For which values of x is the function f(x)