Factoring polynomials: common factor area model | Mathematics II | High School Math | Khan Academy
51Sal finds the measures of a rectangle whose area is 12x⁴+6x³+15x² by taking the greatest common factor.
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High School Math on Khan Academy: Did you realize that the word "algebra" comes from Arabic (just like "algorithm" and "al jazeera" and "Aladdin")? And what is so great about algebra anyway? This tutorial doesn't explore algebra so much as it introduces the history and ideas that underpin it.
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