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5 November, 13:19

The vertex form of the equation of a parabola is y = 2 (x + 4) 2 - 21.

What is the standard form of the equation?

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Answers (1)
  1. 5 November, 16:27
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    y = 2x^2 + 16x + 11

    Step-by-step explanation:

    2 (x + 4) ^2 - 21

    2 (x + 4) (x + 4) - 21

    2 (x^2 + 8x + 16) - 21

    2x^2 + 16x + 32 - 21

    2x^2 + 16x + 11
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