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### Course: Algebra (all content) > Unit 17

Lesson 9: Identifying conic sections from their expanded equations# Conic section from expanded equation: circle & parabola

Sal manipulates the equation x^2+y^2-3x+4y=4 in order to find that it represents a circle, and the equation 2x^2+y+12x+16=0 in order to find it represents a parabola. Created by Sal Khan.

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