algebra

x^2+4x-8

(X+4)^2=6

could you help me please.

  1. 👍
  2. 👎
  3. 👁
  1. If I only knew what the question was. Is there an equal sign on the first?

    1. 👍
    2. 👎
    👤
    bobpursley
  2. That trinomial is not a perfect square.

    1. 👍
    2. 👎
  3. You can easily figure out if a trinomial is a perfect square.
    x^2 + b x + c

    if c = (b/2)^2
    then
    it factors to
    (x + b/2 )^2
    for example

    (x + 3)^2 = x^2 + 6 x + 9
    note that
    9 = (6/2)^2
    so if you were given
    x^2 + 6 x + 9
    you would do
    (6/2)^2 which is 3^2 which is 9
    so sure enought it is a perfect square
    however if you are given
    x^2 + 4 x - 8
    (4/2)^2 = 2 ^2 = 4
    which is NOT - 8 so it is not what you want

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response