(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

6x^3 - 3x^2 - 45x

2. Relevant equations

3. The attempt at a solution

-first factor out 3x

3x(2x^2 - x -15)

2 x 5 = 30 so...

3x(2x^2 + 5x - 6x - 15)

-separate the equations

3x(2x^2 + 5x)( - 6x -15)

-simplify a few things.

3x^2(2x + 5) -3 (2x + 5)

(3x^2 - 3)(2x + 5)

set both equations to zero

2x + 5 = 0

2x = -5

x = -5/2

3x^2 - 3 = 0

3x^2 = 3

thats where I get stuck, that is if I did this right. thanks for any help you can offer.

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# Homework Help: Complex roots

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