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24 February, 21:39

Rewrite the equation by completing the square. f (x) = x^2 + 20x - 86

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  1. 24 February, 22:16
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    f (x) = (x+10) ^2 - 86

    Step-by-step explanation:

    f (x) = x^2 + 20x - 86 f (x) = x^2 + 20x + 100 - 86 (because (20/2) ^2 = 100) f (x) = (x+10) ^2 - 86

    Completing the square means you do (b/2) ^2 where b is: a^2x + bx + c.
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