College Algebra / Alg 321 · Atom · ~20 seconds
Quadratic Functions and Parabolas
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A quadratic function is a polynomial function of degree two; its graph is a parabola, opening upward when a is positive and downward when a is negative.
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f(x) = x² − 4x + 3 has a = 1, so its parabola opens upward — a cup, not a dome.
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