If I had the quadratic expression of x^2 + 6x - 4, and wrote it as (x + 3)^2 + 5, what would be the minimum and maximum values of this and why?

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- Mar 4th 2009, 12:26 PMdb5vryCompleting the square [finding a maximum and minimum value]?
If I had the quadratic expression of x^2 + 6x - 4, and wrote it as (x + 3)^2 + 5, what would be the minimum and maximum values of this and why?

- Mar 4th 2009, 12:55 PMe^(i*pi)
- Mar 4th 2009, 12:58 PMchella182
When completing the square of $\displaystyle x^2+6x-4$ I get $\displaystyle (x+3)^2-13$ since $\displaystyle (x+3)^2=x^2+6x+9$, so to get from 9 to -4 you need to minus 13.

Just as a heads up. - Mar 4th 2009, 01:05 PMHallsofIvy