How do I use a sign chart to solve #x^2+5x-9<0#?
1 Answer
Explanation:
First, we want to find what the zeros of the function are.
Now, make a number line that includes these values, like the one below.
To make the sign chart, plug in values that fall within the specified interval - I tend to pick easy numbers for which I can do calculations in my head.
The original equation is an inequality. We need to find where
graph{x^2+5x-9 [-28.86, 28.87, -14.43, 14.43]}