math

how to put this in vertex form:
-2(2x-1)(x+4)

  1. 👍 0
  2. 👎 0
  3. 👁 90
  1. y= -2(2x-1)(x+4)
    -y/2 = (2x^2 +7x -4 )
    -y/4 = x^2 +7/2 x -2
    -y/4 + 2 = x^2 +7/2 x
    -y/4 + 2 + 49/16 = x^2 + 7/2 x + 49/16
    -y/4 + 81/16 = (x+7/4)^2
    -1/4 (y-81/4) = (x+7/4)^2
    (-7/4, 81/4)

    1. 👍 0
    2. 👎 0
    posted by Damon

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math

    Put the quadratics below into vertex form by completing the square. state the vertex. y=2x^2 - 4x-6

    asked by Lily on March 8, 2014
  2. Math

    Put the quadratics below into vertex form by completing the square. state the vertex. a) y=x^2 - 4x-21

    asked by Lily on March 8, 2014
  3. Algebra

    I have to find the vertex, axis of symmetry, and x intercepts of x^2-x+(5/4). I put it in standard form as -(x+-.5)^2+1.5. Thus, the vertex would be .5, 1.5. But the book's answer is 1/2, 1. How did they get this?

    asked by Erin on November 8, 2009
  4. Pre-cal

    Find the vertex of y^2 + 4y + 2x +10 = 0. Use completing the square to put the equation into standard form as your first step. Could you show me how to get the vertex? Thanks

    asked by Randy on May 6, 2010
  5. Algebra 2

    -4x^2-2-3 Put the equation in vertex form and find the vertex

    asked by Ara on December 5, 2011
  6. Algebra 2

    Hey I am working on math homework that involves "Standard Form to Vertex Form by Averaging." My class is just starting to learn this today, but I am totally lost still on what to do. Can you please help? The formula for this is

    asked by Tessa on February 8, 2010
  7. Algebra 2

    Hey I am working on math homework that involves "Standard Form to Vertex Form by Averaging." My class is just starting to learn this today, but I am totally lost still on what to do. Can you please help? The formula for this is

    asked by Tessa on February 8, 2010
  8. Algebra2

    Write an equation of an ellipse in standard form with center at the origin and with the given vertex and co-vertex vertex at (-3,0) and co-vertex at (0.2)

    asked by Steve on March 8, 2017
  9. Math

    How do I put this into Vertex form? y=6x^2+7x+5

    asked by Bree on March 5, 2017
  10. Algebra

    Can you please help me with the below question: The vertex of a parabola is located at (-12, -1). The parabola also passes through the point (-10, 5). Write the equation of this parabola in both vertex form and standard form.

    asked by Janae on March 4, 2017

More Similar Questions