+0  
 
+1
169
2
avatar+17 

I need help graphing this function. I know the answer but I don't know how to put all three together on one graph.

 

also, is this correct?

 Jun 10, 2019
edited by mindless  Jun 10, 2019
 #1
avatar+106533 
+2

 

Here you go for the first one : https://www.desmos.com/calculator/ofobm3u4af

 

For the second

 

You have the correct graphs...the intersection points are  ( -1, -3)  and ( 3,5)

 

Algebraically....set the functions equal

 

x^2 -4  = 2x - 1       rearrange as

 

x^2 - 2x - 3  = 0   factor

 

(x - 3) ( x + 1)  = 0

 

Set each factor and solve for x

 

x -3  = 0          x + 1  = 0

x = 3                  x = -1

 

Put these values into either function for x and you should get the same intersection points as above

 

Hope that helps  !!!

 

 

cool cool cool

 Jun 10, 2019
edited by CPhill  Jun 10, 2019
 #2
avatar+17 
+1

Thank you so much!

mindless  Jun 10, 2019

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