Help with a quadratic equation using factoring

Hi. I'm having difficulty with this equation:

(5x² + 6x)(12x² - 5x - 2) = 0

I've been at it for a while, but have been unable to come up with the answer in the key (Doh). I would appreciate any help. Thanks!

Quote:

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Originally Posted by cemillman

Hi. I'm having difficulty with this equation:

(5x² + 6x)(12x² - 5x - 2) = 0

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x(5x+6)(4x+1)(3x-2) = 0