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The quadratic formula will tell you the two roots of the equation. For example, for the quadratic y = x^2 - 1, the graph would intersect the x-axis at -1 and 1. These are the roots. If the graph...

I've had people tell me to not to include the .h in lines like #include <iostream.h> unless it's a custom header. How widespread of a convention is this?

Thanks,
farruinn