median
don steward
mathematics teaching 10 ~ 16
Friday 11 November 2016
solving quadratics by transformation
an alternative method to completing the square for solving a quadratic equation
maybe a simpler method to understand, for some
based on the difference of two squares
general principle: given a problem, try to transform it to a simpler one
this method was introduced to me by David Wells
the powerpoint is
here
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