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1 April, 05:46

Which equation is y = 9x2 + 9x - 1 rewritten in vertex form?

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  1. 1 April, 08:41
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    The general equation of a quadratic is expressed as y = ax^2+bx+c. To convert the general equation to vertex form, we need to obtain this form:

    (y - k) = a (x - h) ^2

    This could be done by using completing the square method.

    y = 9x^2 + 9x - 1 y + 1 = 9 (x^2 + x)

    y + 1 + 9/4 = 9 (x^2 + x + 1/4)

    y + 13/4 = 9 (x+1/2) ^2
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