OCR MEI Core 1 3.12 Sketching y = 3x^2 - 5x + 4 - when the Quadratic Formula Fails

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Great thanks! I believe I once saw a derivation not using completing the square form - but I could be mistaken, does happen

bluesparklejet
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why is it 5/3? shouldnt it be 5/2? (when calculating vertex)

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