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25 August, 11:09

What error did zacharias make?

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  1. 25 August, 14:12
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    The equation 0 = - 2x2 5x - 3 was the quadratic formula that Zacharias used. However, he started substituting as:

    Quadratic formula as x =; substitution as x

    The errors he made: he mistakenly used the negative (-) and postive (+)

    * - 5 should have been 5

    * 52 should have been - 52

    * both the numerator and the denominator should have been - 2 instead of 2
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