The discriminant of a quadratic equation is:

Plug in the values.


Since the discriminant is negative, you can tell that the quadratic has no real solutions.
Hope that helped!
~Cam943, Moderator
Shade the top side of the boundary line if you have the inequality symbols > or ≥. Shade the bottom side of the boundary line if you have the inequality symbols < or ≤.

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Use the formula.
Area = (1/2)*13*10*sin(72°) ≈ 61.8 units².