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A math question... help?

Asked by silverangel (939points) October 3rd, 2011

There is this Algebra problem that I don’t understand how to solve. Here it is:
Find the coordinates of the points at which the line with the equation y=x-4 intersects the curve with equation Y 2 =2X 2 -17

I already have the solution which is (-11,-15) and (3,-1) but I don’t know how to get, can you help me please?

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