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-   -   Points of intersection of functions (https://www.askmehelpdesk.com/showthread.php?t=529362)

  • Nov 26, 2010, 10:52 PM
    hjacks6
    Points of intersection of functions
    Find the points of intersection of the following functions

    y = (x+1)^2 and y = - x^2 + x + 4

    If possible can you also show how to check results on graphics calculator. Thanks
  • Nov 27, 2010, 12:41 AM
    Unknown008

    I don't know how to use a graphics calculator, but you can solve this by using simultaneous equations and plugging the values you got back in the original equations to see if they are good.





    This becomes:



    Expand and solve the quadratic. Post what you get! :)
  • Nov 27, 2010, 02:42 AM
    galactus
    1 Attachment(s)

    If you have a graphing calculator, all you have to do is graph the two given functions and see where they intersect.

    As you can see, there are 2 POI.

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