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hjacks6 · Nov 26, 2010, 10:52 PM

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

Unknown008 · Nov 27, 2010, 12:41 AM

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.

$y = (x+1)^2$

$y = -x^2 + x + 4$

This becomes:

$(x+1)^2 = -x^2 + x + 4$

Expand and solve the quadratic. Post what you get! :)

galactus · Nov 27, 2010, 02:42 AM

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.