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2 November, 08:42

In the derivation of the quadratic formula by completing the square, the equation is created by forming a perfect square trinomial. What is the result of applying the square root property of equality to this equation?

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  1. 2 November, 09:03
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    The result is

    x + b/2a = ±√[ (b² - 4ac) / 2a]

    Step-by-step explanation:

    In the derivation of the quadratic formula by completing the square, the equation is created by forming a perfect square trinomial

    ax² + bx + c = 0

    x² + (b/a) x + c/a = 0

    x² + 2 (b/2a) x + b²/4a² - b²/4a² + c/a = 0

    (x + b/2a) ² - b²/4a² + c/a = 0

    (x + b/2a) ² = b²/4a² - c/a

    (x + b/2a) ² = (b² - 4ac) / 2a

    Apply square roots to both sides

    x + b/2a = ±√[ (b² - 4ac) / 2a]
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