Asked by Josh
solve the following inequality. write your solution in interval notation.
x^3+9x^2-108 less than or equal to 0
please show all work
x^3+9x^2-108 less than or equal to 0
please show all work
Answers
Answered by
Mac
Get you started you have to start by guessing
X=3 works
Then do long division
Answer will be x^2+12x+36
Factor
(X+6)(x+6)
3and -6 are your critical values
Now you have to test the different regions
X=3 works
Then do long division
Answer will be x^2+12x+36
Factor
(X+6)(x+6)
3and -6 are your critical values
Now you have to test the different regions
Answered by
Josh
how do I test the different regions??
Answered by
Mac
Just pick a number in the region
Plug back into the function
Neg ans means less than 0
Pos ans means greater than 0
Plug back into the function
Neg ans means less than 0
Pos ans means greater than 0
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