College Algebra / Alg 326 · Atom · ~20 seconds
The Vertex-Sign Error
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The vertex-sign error reads the vertex of (x + 3)² + 5 as (3, 5); the true vertex is (−3, 5).
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At x = 3, the function answers (3 + 3)² + 5 = 41, nowhere near a vertex; at x = −3, it bottoms at 5.
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Rewrite the inside as subtraction before reading h.
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