What is the minimum value of the function g(x) = x^2 - 6x - 12?

9514 1404 393

  -21

Step-by-step explanation:

I find it convenient to read the value from the graph created by a graphing calculator. The minimum is -21.

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The function can be rearranged to vertex form, which also shows the minimum value.

  g(x) = (x^2 -6x +9) -12 -9*

  g(x) = (x -3)^2 -21 . . . . . . . . vertex form

The vertex is (3, -21), so the minimum is -21.

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* we added the square of half the x-coefficient inside parentheses, and its opposite outside parentheses. This makes the expression inside parentheses a perfect square trinomial.

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total