Use the x-intercept method to find all real solutions of the equation.
x^3-8x^2+9x+18=0
2 answers:
Answer:
a. 
Step-by-step explanation:
The given equation is;

To solve by the x-intercept method we need to graph the corresponding function using a graphing calculator or software.
The corresponding function is

The solution to
is where the graph touches the x-axis.
We can see from the graph that; the x-intercepts are;
(-1,0),(3,0) and (6,0).
Therefore the real solutions are:

Answer:
Use a graphing utility or a graphing calculator.
x = -1, 3, 6. (3 real solutions).
Step-by-step explanation:
The points of intersection on the x axis are the 3 solutions to the equation.
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