Results 1 to 2 of 2

Math Help - Parabola/Vertex Concern...

  1. #1
    Member
    Joined
    Jan 2006
    Posts
    118

    Parabola/Vertex Concern...

    I need to find b and c so that the parabola y = -18 x^2 + b x + c has vertex (1 , -7 ).

    very confusing..
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    12,110
    Thanks
    976
    Quote Originally Posted by frozenflames View Post
    I need to find b and c so that the parabola y = -18 x^2 + b x + c has vertex (1 , -7 ).

    very confusing..
    vertex is at x = -\frac{b}{2a}

    1 = \frac{b}{36}

    b = 36

    ... now use the coordinates again in the original equation and solve for c
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Writing the vertex of a parabola
    Posted in the Algebra Forum
    Replies: 9
    Last Post: August 10th 2011, 01:23 PM
  2. find vertex of parabola
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: July 12th 2010, 03:35 PM
  3. Replies: 2
    Last Post: April 19th 2009, 02:16 PM
  4. Vertex of a Parabola
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: March 8th 2009, 06:22 AM
  5. vertex of parabola
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: October 7th 2008, 03:20 PM

Search Tags


/mathhelpforum @mathhelpforum