15x - 5 = 2x^2 + 6x + 4?

Update:

Sorry I should have been more exact on what I needed. I need to know what to do with the 2x^2

4 Answers

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  • 1 decade ago
    Favorite Answer

    15x - 5 = 2x^2 + 6x + 4

    Add 5 to both sides.

    15x = 2x^2 + 6x + 9

    Subtract 15x from both sides.

    0 = 2x^2 - 9x + 9

    This trinomial can be factored.

    0 = (2x - 3)(x - 3)

    2x - 3 = 0 or x - 3 = 0

    2x = 3 or x = 3

    x = 3/2 or x = 3

  • 1 decade ago

    first you would get everything to one side and make the equation equal to zero. So move the 15x and the 5 to the right side and make sure to change their sign.

    0 = 2^2 + 6x + 4 + 5 -15x

    Then add like terms and get the following:

    0 = 2^2 - 9x + 9

    use the quadratic method for solving this

  • ¥¥Z
    Lv 4
    1 decade ago

    15x - 5 = 2x^2 + 6x + 4

    0 = 2x^2 - 9x + 9 after moving everything to one side

    0 = (2x - 3)(x - 3)

    two problems are left to solve for x

    0 = 2x - 3

    3 = 2x

    3/2 = x

    and...

    0 = x - 3

    3 = x

    x = 3 or 3/2

  • 1 decade ago

    move the (15x-5) to the right side, so the equation equals 0. then use the quadratic formula.

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  • 1 decade ago

    Do your own homework, if you have questions on how to DO it, then ask.

    I would advise combining like things. Such as: move -5 over to the other side. subtract 6x from both sides.

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