Wikipedia:Sandbox: Difference between revisions
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Another formula for factoring is the sum or difference of two cubes. The sum can be represented by |
Another formula for factoring is the sum or difference of two cubes. The sum can be represented by |
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:<math> a^3 + b^3 = (a + b)(a^2 - ab + b^2),\,\!</math> |
:<math> a^3 + b^3 = (a + b)(a^2 - ab + b^2),\,\!</math> |
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Note : the second factor never becomes zero with real ''a'' and ''b'' |
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and the difference by |
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:<math> a^3 - b^3 = (a - b)(a^2 + ab + b^2).\,\!</math> |
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For example, ''x''<sup>3</sup> − 10<sup>3</sup> (or ''x''<sup>3</sup> − 1000) can be factored into (''x'' − 10)(''x''<sup>2</sup> + 10''x'' + 100). |
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Note : the second factor never becomes zero with real ''a'' and ''b'' |
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===Sum/difference of two fourth powers=== |
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THis can always be factored as follows : |
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<math> a^4 + b^3 = (a + b)(a^2 - ab + b^2),\,\!</math> |
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and the difference by |
and the difference by |
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:<math> a^3 - b^3 = (a - b)(a^2 + ab + b^2).\,\!</math> |
:<math> a^3 - b^3 = (a - b)(a^2 + ab + b^2).\,\!</math> |
Revision as of 12:43, 25 March 2011
Welcome to this sandbox page, a space to experiment with editing.
You can either edit the source code ("Edit source" tab above) or use VisualEditor ("Edit" tab above). Click the "Publish changes" button when finished. You can click "Show preview" to see a preview of your edits, or "Show changes" to see what you have changed. Anyone can edit this page and it is automatically cleared regularly (anything you write will not remain indefinitely). Click here to reset the sandbox. You can access your personal sandbox by clicking here, or using the "Sandbox" link in the top right.Creating an account gives you access to a personal sandbox, among other benefits. Do NOT, under any circumstances, place promotional, copyrighted, offensive, or libelous content in sandbox pages. Repeatedly doing so WILL get you blocked from editing. For more info about sandboxes, see Wikipedia:About the sandbox and Help:My sandbox. New to Wikipedia? See the contributing to Wikipedia page or our tutorial. Questions? Try the Teahouse! |
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Factoring other polynomials
Sum/difference of two cubes
Another formula for factoring is the sum or difference of two cubes. The sum can be represented by
Note : the second factor never becomes zero with real a and b and the difference by
For example, x3 − 103 (or x3 − 1000) can be factored into (x − 10)(x2 + 10x + 100). Note : the second factor never becomes zero with real a and b
Sum/difference of two fourth powers
THis can always be factored as follows : and the difference by
For example, x3 − 103 (or x3 − 1000) can be factored into (x − 10)(x2 + 10x + 100).