Optimization

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The optimization of a quadratic equation is the process to find the maximum or minimum of said quadratic.

Process

It involves converting a quadratic to the standard form $a(x-h)^2+k$ by completing the square, then applying the Trivial Inequality. Then the maximum or minimum (it depends on which way the graph of the quadratic is facing) is $k$.

Formula

To optimize a quadratic, one might use the method described above, or one could use this other, smoother, method:

If $a>0$, then the quadratic $ax^2+bx+c=0$reaches its minimum when $x=-\frac{b}{2a}$, while when $a<0$, the quadratic reaches its maximum when $x=-\frac{b}{2a}$.