Results 1 to 2 of 2

Math Help - hw help

  1. #1
    Newbie
    Joined
    Jan 2009
    Posts
    1

    hw help

    I'm having trouble figuring out a math problem.

    1. x2(sqaured) + 12 =-7x

    2. -6x - 2 = (3x + 1)2(sqaured)

    My first instinct was to factor both. Not sure if this was the right approach. Please any advice or links to similar problems to help solve would help a lot

    thanks in advance!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    10,973
    Thanks
    1012
    Quote Originally Posted by Stump101 View Post
    I'm having trouble figuring out a math problem.

    1. x2(sqaured) + 12 =-7x

    2. -6x - 2 = (3x + 1)2(sqaured)

    My first instinct was to factor both. Not sure if this was the right approach. Please any advice or links to similar problems to help solve would help a lot

    thanks in advance!
    1. x^2 + 12 = -7x

    x^2 + 7x + 12 = 0

    (x + 3)(x + 4) = 0

    x + 3 = 0 or x + 4 = 0

     x = -3 or  x = -4.


    2. -6x - 2 = (3x + 1)^2

    -2(3x + 1) = (3x + 1)^2

    0 = (3x + 1)^2 + 2(3x + 1)

    0 = (3x + 1)(3x + 1 + 2)

    0 = (3x + 1)(3x + 3)

    0 = 3(3x + 1)(x + 1)

    So 3x + 1 = 0 or x + 1 = 0

    x = -\frac{1}{3} or x = -1.
    Follow Math Help Forum on Facebook and Google+


/mathhelpforum @mathhelpforum