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Vertex
________: the point where a parabola changes direction.
slopes of parallel lines
Quadratic equation in standard form: ax^2+bx+c= 0. What are ALWAYS equal? Answer with a single words or term.
slopes of perpendicular lines
Quadratic equation in standard form: ax^2+bx+c= 0. The slopes of parallel lines are ALWAYS equal. What are negative opposites? Answer with a single words or term.
