SOLUTION: If t is a real number, what is the maximum possible value of the expression -t^2 + 8t -4?

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Question 1026783: If t is a real number, what is the maximum possible value of the expression -t^2 + 8t -4?
Answer by ikleyn(52781) About Me  (Show Source):
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If t is a real number, what is the maximum possible value of the expression -t^2 + 8t -4?
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Complete the square

-t%5E2+%2B+8t+-4 = -%28t-4%29%5E2+%2B+12.

The maximum possible value is 12.