Hello,Originally Posted byalientype

with all your problems you have to do the following steps:

Ifthe factor before x^2 is 1 (as it is with your problems) you can calculate a complete square and an additional summand:

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Coordinates of the Vertex are V(-2,-13).

1. step: Divide the coefficient ofx(not x^2!!) by 2.

2. step:Square this quotient.

3. step: Add this squareand subtract it at once

4. step: The first three summands are a complte square.

5. step: What you've subtracted and the constant together give the y-coordinate of the vertex.

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Coordinates of the Vertex are V(3,7).

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Coordinates of the Vertex are V(4,-17).

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Coordinates of the Vertex are .

Greetings

EB