Ok, I need to find 2 lines that when multiplied (y=x*y=x yields y=x^2)(adsbygoogle = window.adsbygoogle || []).push({});

create a parabola in which those two lines are tangent to it. My problem is that I have no idea where to start. I think that the two lines have to have opposite slopes, or at least one slope must be positive and one must be negative, else both lines would follow the same direction, and there is an obvious problem there...

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# Y=x*y=x yields y=x^2 tangents

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