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This guide explains the method of grouping for factoring quadratics with four or more terms. When terms share a common factor but not all, grouping helps to organize and simplify the factoring process. Learn to identify groups of terms, underline them to keep track, factor each group individually, and remove any common factors to complete the factoring. Clear examples and step-by-step solutions illustrate the process, ensuring you grasp the concept thoroughly. Master quadratic factoring with these structured techniques.
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The method of Grouping for factoring is used when the quadratic has 4 or more terms where a group of them share a Common Factor but not all terms share this Common Factor.
(1) Look for the groups of terms that share a Common Factor and group these, if needed. To factor using Grouping:
The terms are already grouped correctly here, as the first two terms have a Common Factor (x) and the last two terms have a different Common Factor (−5). (2) Underline the groups to be factored to help focus on each group separately.
(4) Remove the bracketed Common Factor to complete the factoring.
Solution: (1) Look for the groups of terms that share a Common Factor and group these, if needed.
Solution: Groups are fine as given. (2) Underline the groups to be factored to help focus on each group separately.
Solution: (3) Factor each underlined group.
Solution: (4) Remove the bracketed Common Factor to complete the factoring.
Solution: The factoring is complete.
Solution: • Look for the groups of terms that share a Common Factor and group these, if needed. • Underline the groups to be factored to help focus on each group separately. • Factor each underlined group. • Remove the bracketed Common Factor to complete the factoring.
Solution: Follow the steps outlined in the previous slides, noting there is a Common Factor that should be removed first.
Solution: Here’s an alternate solution, if the common factor is NOT removed first.