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In an equation of the form $k = ax^2 + bx + c$ with $a > 0$, the least possible value of $k$ occurs at $x = -b/(2a)$.  In the equation $k = (6x + 12)(x - 8)$, what is the least possible value for $k$?

 Aug 20, 2021
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Using your formula, the least possible value of k is -120.

 Aug 20, 2021

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