SOLUTION: For what values of c do the equations y=x2+2x-3 and y=c have no point in common?

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Question 723733: For what values of c do the equations y=x2+2x-3 and y=c have no point in common?
Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
y=x2%2B2x-3 --> y=x2%2B2x%2B1-4 --> y=%28x%2B1%29%5E2-4
%28x%2B1%29%5E2%3E=0 --> %28x%2B1%29%5E2-4%3E=-4
So for highlight%28c%3C-4%29 y=x2%2B2x-3%3E=-4%3Ec
and the two equations have no point in common.