I need to find the X-intercepts of:

Y= 3x^4 - 6x^2 + 5/3

Thank you for any help.

I have been away from any math for over five years so a step by step would be appreciated.

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- Nov 26th 2007, 05:57 PMJDG1317Analyzing a graph
I need to find the X-intercepts of:

**Y= 3x^4 - 6x^2 + 5/3**

Thank you for any help.

I have been away from any math for over five years so a step by step would be appreciated. - Nov 26th 2007, 06:00 PMJhevon
- Nov 26th 2007, 06:13 PMJDG1317
I really don't even know what to do from there. Sorry for being a pain. I really should have relearned some of these skills before signing up for calc class.:(

- Nov 26th 2007, 06:20 PMJhevon
use the quadratic formula.

for a quadratic of the form $\displaystyle y = ax^2 + bx + c$ the roots (that is, the solution(s) to $\displaystyle ax^2 + bx + c = 0$) are given by:

$\displaystyle x = \frac {-b \pm \sqrt{b^2 - 4ac}}{2a}$

use that to solve for k. when done, replace k with x^2 and solve for x - Nov 26th 2007, 06:46 PMJDG1317
When I used the quadratic equation I got:

k= 3 and,

k= .6

When I replaced k with X^2 I get

X= +/- sqrt(3)

X= +/- sqrt(.6)

These answers don't match up with the intercepts when I check them on the graphing calc. - Nov 26th 2007, 07:23 PMJhevon