Processing Math: Done

To print higher-resolution math symbols, click the
Hi-Res Fonts for Printing button on the jsMath control panel.

jsMath

Warning: jsMath requires JavaScript to process the mathematics on this page.
If your browser supports JavaScript, be sure it is enabled.

Solution 2.1:3e

(Difference between revisions)

Revision as of 08:36, 9 September 2008

Both terms contain x, which can therefore be taken out as a factor (as can 2).

18x−2x3=2x

9−2x

x2=2x(9−x)

The remaining second-degree factor 9−x2 can then be factorized using the conjugate rule

2x(9−x2)=2x(32−x2)=2x(3+x)(3−x)

which can also be written as −2x(x+3)(x−3)