Sunday, June 2, 2013

What is the minimum or maximum value of the quadratic function: f(x) ?

+f%28x%29=+5x%5E2-20x%2B9+  

x%5Bmin%5D=-b%2F%282a%29=-%28-20%29%2F%282%2A5%29=2


the actual value is

+f%282%29=+5%2A2%5E2-20%2A2%2B9=-11+



:)
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