Math question: What is the derivative of f(x) = 3x^4 - 2x^3 + 5x^2 - 7x + 9?
+
What are the characteristics of an ellipse defined by the equation x^2/a^2 + y^2/b^2 = 1?
+
What is the rule of congruence that states two triangles are congruent if two sides and the included angle of one triangle are equal to two sides and the included angle of another triangle?