Results 1 to 3 of 3

Thread: Quadratic Equation

  1. January 15th 2009, 05:12 AM #1
    studentme
    studentme is offline
    Newbie
    Joined
    Jan 2009
    Posts
    9

    Quadratic Equation

    I am in need of some assistance, thanks!

    f (x) = 2 - (x - 3)^2 .

    (a) I need to write this function in the general form of a quadratic equation ax^2 + bx + c

    The answer I got:

    <br /> f(x) = 2 - (x-3)(x-3)<br /> = 2- x^2-3x-3x+9<br /> = 2 - x^2-6x+9<br /> = -x^2-6x+11<br />

    Can anyone double check this for me, please?
    Follow Math Help Forum on Facebook and Google+
  2. January 15th 2009, 05:34 AM #2
    Last_Singularity
    Last_Singularity is offline
    Member Last_Singularity's Avatar
    Joined
    Dec 2008
    Posts
    157
    Quote Originally Posted by studentme View Post
    I am in need of some assistance, thanks!

    f (x) = 2 - (x - 3)^2 .

    (a) I need to write this function in the general form of a quadratic equation ax^2 + bx + c

    The answer I got:

    <br /> f(x) = 2 - (x-3)(x-3)<br /> = 2- x^2-3x-3x+9<br /> = 2 - x^2-6x+9<br /> = -x^2-6x+11<br />

    Can anyone double check this for me, please?
    <br /> f(x) = 2 - (x-3)(x-3)<br /> = 2 - (x^2-6x+9)<br /> = -x^2+6x-7<br />
    Follow Math Help Forum on Facebook and Google+
  3. January 15th 2009, 07:57 AM #3
    Isomorphism
    Isomorphism is offline
    Lord of certain Rings
    Isomorphism's Avatar
    Joined
    Dec 2007
    From
    IISc, Bangalore
    Posts
    1,460
    Quote Originally Posted by studentme View Post
    <br /> f(x) = 2 - (x-3)(x-3)<br /> = 2 - x^2-3x-3x+9<br /> = 2 - x^2-6x+9<br /> = -x^2-6x+11<br />
    {2 - x^2-3x-3x+9} \neq 2 - (x^2-3x-3x+9) ... This is why parantheses are so important!
    Follow Math Help Forum on Facebook and Google+
« proving | Sign Chart »

Similar Math Help Forum Discussions

  1. Quadratic equation
    Posted in the Algebra Forum
    Replies: 2
    Last Post: October 16th 2011, 07:03 AM
  2. Quadratic equation
    Posted in the Algebra Forum
    Replies: 5
    Last Post: March 16th 2011, 10:27 AM
  3. Is there a cubic equation like the quadratic equation?
    Posted in the Algebra Forum
    Replies: 3
    Last Post: April 25th 2010, 03:53 PM
  4. Quadratic Equation
    Posted in the Algebra Forum
    Replies: 2
    Last Post: October 14th 2009, 05:34 AM
  5. quadratic equation
    Posted in the Algebra Forum
    Replies: 1
    Last Post: December 15th 2008, 04:06 AM

Search Tags


/mathhelpforum @mathhelpforum