How to factor polynomials: Difference between revisions

Revision as of 01:12, 8 October 2009

Revision as of 01:18, 8 October 2009

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Multipy 6 and -3, <math>6(-3)=-18</math>

====Step 2====

Find factors of '''ac'''.<br />

Find factors of -18 which gives the combinations: -1(18), 1(-18), -2(9), 2(-9), -3(6), and 3(-6).<br />

====Step 3====

Decide which factors of '''ac''' that when added together will give '''b'''.<br />

The combination of -2 and 9 is the one needed since -2+9=7.<br />

====Step 4====

Rewrite the middle term of '''bx''' using the factors found in step 3.

Instead of <math>7x</math>, write <math>6x^2-2x+9x+-18</math>

==References==