Thursday

December 18, 2014

December 18, 2014

Posted by **Jon** on Sunday, March 2, 2008 at 5:13pm.

y = |2x+3|^2-5

h = 3

k = -5

vertex = (3,-5)

axis of symmetry = x = 3

direction = up b/c a = 2 and 2>0

- Algebra II -
**Damon**, Sunday, March 2, 2008 at 5:24pmy = 2 (x+3)^2 - 5

(x+3)^2 = (1/2)(y+5)

(x+3)^2 = 4 (1/8) (y+5)

vertex (-3,-5)

symmetric about x = -3

indeed opens up because a = +1/8, check as x becomes very positive or very negative, y gets big positive

- Algebra II(can you explain) -
**Jon**, Sunday, March 2, 2008 at 5:41pmI don't understand what you did after the 1st line.

- Algebra II -
**Damon**, Sunday, March 2, 2008 at 7:16pmHmmm

I know, and I bet it is in your book, that

a formula of type:

(x-h)^2 = 4 a (y-k)

is a parabola with vertex at (h,k)

a is the distance from vertex to focus and from vertex to directrix

if a is +, opens up. if a is -, opens down

**Answer this Question**

**Related Questions**

Troy - Can someone check my answers for the following problems. Simplify. Assume...

algebra - 1)Find the exact solutions to 3x^2=5x-1 using the quadratic formula. ...

Algebra II - Identify the vertex, axis of symmetry, and direction of opening for...

Algebra - Identify the vertex and the axis of symmetry for the graph of y=5(x-2...

Algebra - All parabolas are symmetric with respect to a line called the axis of ...

Pre Cal. - 1. Identify the conic section represented by: 9y^2+4x^2 - 108y+24x= -...

math help,algebra - Okay this is what i have to do but i think i am doing ...

Algebra,Math, graphs help - This is what the directions state to do: (A) ...

math - 1 identify the coordinates of the vertex and the equation of the axis of ...

math, algebra,graphs help - THe directions state: (A)Complete the table, (B) ...