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If s is a real number, then what is the smallest possible value of 2s^2-8s+19?

Jul 1, 2022

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The minimum occurs at $$-{b \over 2a} = -{-8 \over 4} = 2$$

Now, substitute this into the equation: $$\text{___} = 2\times 2^2 - 8 \times 2 + 19$$

Jul 1, 2022