solv for x, 6x^3 -7x^2 -12x +7 = 0

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- Aug 7th 2010, 04:23 AMwinsomeSolving Equation
solv for x, 6x^3 -7x^2 -12x +7 = 0

- Aug 7th 2010, 06:58 AMeumyang
Using the Rational Zeros Test:

... and guess-and-check with these potential rational zeros, I see that 1/2 is a zero. So the polynomial factors to:

The quadratic isn't factorable, so you'll have to use the quadratic formula to get the other two roots. - Aug 7th 2010, 07:35 AMProve It
Isn't it?

. - Aug 7th 2010, 07:46 AMeumyang
Touché. (Giggle) (Of course I meant factorable over the rationals. (Wink))