SOLUTION: Find all of the real zeros of the polynomial P(x)=12x^3-129x^2+342x-189.

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Find all of the real zeros of the polynomial P(x)=12x^3-129x^2+342x-189.       Log On


   

Question 370225: Find all of the real zeros of the polynomial P(x)=12x^3-129x^2+342x-189.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
12x^3-129x^2+342x-189
4x^3-43x^2+114x-63
63 has a factor of 7, try that.
Then it's a quadratic.
--> 0.75, 3, 7