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**dericteong****Member**- Registered: 2006-10-16
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**luca-deltodesco****Member**- Registered: 2006-05-05
- Posts: 1,470

a = 1, h = -1, k = -2

the vertex is then the minimum point since a>0, this occurse when (x+1)^2 is at 0, i.e. x +1 = 0, x = -1

so the vertex is at (-1,-2), the symmetric axis would be x = -1, and the y intercept if it means y intercept with symmetric axis, its -2.

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,604

Also see Completing the Square

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