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What is the sum of the different points on $x$-axis and that intersect with the two curves :

$$x^2=x+y+4 , y^2=y-15x+36$$

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    Looks like you need to solve the system. Try to find $y$ in terms of $x$ from the first equation, and plug into the second one.2012-09-23
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    Set $y=0$, solve both for $x$, add the results. (Assuming I interpreted your question correctly.)2012-09-23

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