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11 July, 01:18

What is the line of symmetry for the parabola whose equation is y = 3x2 + 24x - 1?

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  1. 11 July, 03:49
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    Hello:

    y = 3x2 + 24x - 1

    = 3 (x²+8x) - 1

    = 3 (x² + 2 (4) (x) + 4² - 4²) - 1

    = 3 ((x+4) ² - 16) - 1

    y = 3 (x+4) ² - 49

    the line of symmetry is : x = - 4
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