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Look for something that you can divide all the terms by. It should be the biggest possible factor you can divide them all by. The remaining terms are left in a bracket. |
 Example #1: 3x2 + 21x + 36 Take out the common factor: = 3(x2 + 7x + 12) |
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Example #2: 4x2y + 16xy - 84y Take out the common factor: = 4y(x2 + 4x - 21) |
Example #3: 50x2 - 8 Take out the common factor: = 2(25x2 - 4) |