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Vertex of a Parabola
The vertex of a parabola is the exact point where the parabola intersects its axis of symmetry. Depending on the direction the parabola opens, this point is either the lowest point on the curve (for an upward-opening parabola) or the highest point (for a downward-opening parabola). For a parabola in the general form , the vertex is found by first computing the -coordinate using x = - rac{b}{2a} and then substituting that value back into the equation to solve for . For a parabola in the standard form , the vertex is directly read as the point .
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Elementary Algebra @ OpenStax
Ch.10 Quadratic Equations - Elementary Algebra @ OpenStax
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Intermediate Algebra @ OpenStax
Ch.9 Quadratic Equations and Functions - Intermediate Algebra @ OpenStax
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