What are the two solutions of x2 – 2x – 4 = –3x + 9?

The solutions are the x-values that make the two expressions equal, so they are the x-coordinates where the graphs intersect. Setting the expressions equal gives x² − 2x − 4 = −3x + 9, or x² + x − 13 = 0. Thus the correct choice is “the x-coordinates of the intersection points.”

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