Question

Someone please help me finish this question?

For y = x2 + 4x − 12:

1) Determine if the parabola opens up or down.
2) State if the vertex will be a maximum or minimum.
3) Find the vertex.
4) Find the x-intercepts.
5) Describe the graph of the equation.
Show all work and use complete sentences to receive full credit.

Answer 1

complete the square
that way u'll find the vertex

Answer 2

So how do i find the vertex of y = x2 + 4x − 12

Answer 3

can you try graphing the equation by substituting the value of x with different numbers?

-3 | 2 | 1 | 0 | 1 | 2 | 3
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Answer 4

I think all the work I did before was wrong... So i am going to start all over again

Answer 5

yeh. try graphing it with the values I've provided :) do this step-by-step and then you will see similarities.

Answer 6

But how will i find the vertex?

Answer 7

did you do it?

Answer 8

and then you need to know how to write the equation into the standard form of a quadratic function

pp 129 and on
http://finedrafts.com/files/Larson%20PreCal%208th/Larson%20Precal%20CH2.pdf