SOLUTION: Sketch the graph of the function: y=(x-2)(x-3(x+5) 1- Determine the end behavior of the function. 2-

Algebra ->  Graphs -> SOLUTION: Sketch the graph of the function: y=(x-2)(x-3(x+5) 1- Determine the end behavior of the function. 2-      Log On


   



Question 1023646: Sketch the graph of the function:
y=(x-2)(x-3(x+5)
1- Determine the end behavior of the function.
2- Find all x-intercepts:

-2
-1
0
1
2

3- Find all y-intercepts.
60
48
30
12
0
4- Use the x-intercepts to divide the x axis into intervals

5- Choose at least one point within each interval to show whether the function is positive or negative.
6- Sketch the graph.
I have the partial answer but I am having difficulty with the rest. Help would be greatly appreciated.

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
As x gets large (positive), all three factors stay positive so the function goes to infinity
As x gets large (negative), all three factors stay negative so the function goes to -infinity.
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When x=0, y=%28-2%29%28-3%29%285%29=30
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1.(-infinity,-5)
2.(-5,2)
3.(2,3)
4.(3,infinity)
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1.(-infinity,-5)
x=-6
y=%28-6-2%29%28-6-3%29%28-6%2B5%29=%28-8%29%28-9%29%28-1%29=-72
Negative
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2.(-5,2)
x=0
y=30
Positive
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3.(2,3)
x=5%2F2
y=%285%2F2-2%29%285%2F2-3%29%285%2F2%2B5%29=%281%2F2%29%28-1%2F2%29%2815%2F2%29=-15%2F8
Negative
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4.(3,infinity)
x=4
y=%284-2%29%284-3%29%284%2B5%29=%282%29%281%29%289%29=18
Positive
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