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21 May, 15:59

How do i do the quadratic formula

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  1. 21 May, 16:10
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    Quadratic formula is

    x = - b + or - sqrt b^2-4ac / 2a

    Just plug in your numbers ... let's say we have x^2 + 4x + 8 = 0

    Plug it in.

    x = - (-4) + / - sqrt (4) ^2 - 4 (1) (8) / 2 (1)

    x = 4 + / - sqrt 16-32 / 2

    x = 4 + / - sqrt - 16/2 (no real solutions)
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