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March 29, 2017

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I need to find the value of x.
9x^3 + 9x = 30x^2
It's confusing because apparently I have to do 9x^3 + 9x and then add the + 30x^2 to it, and then make it equal 0, so it ends up like this:

9x^3 + 9x + 30x^2 = 0
And afterward, I would factor it. How do you factor it?
I'm having trouble factoring in general. =/

  • Algebra: factoring - ,

    9x^3 + 9x + 30x^2 =

    x [9 x^2 + 30 x + 9]

    Then x = 0 or 9 x^2 + 30 x + 9 = 0

    Divide by 3:

    3 x^2 + 10 x + 3 = 0

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

    x = -3 or x = -1/3

  • Algebra: factoring - ,

    9x^3 + 9x = 30x^2

    AFTER SUBTRACTING 30X^2 FROM EACH SIDE SHOULD BE LIKE SO;

    9x^3 + 9x -30^2 = 0

    IS THIS THE PROBLEM?

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