Factoring: Factor 9a^2 b - 27ab^2 + 4ab - 12b^2

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Megan from SVSU Micro Math helps you factor an expression by grouping. In this problem, we first factor out a common factor.

Problem: Factor 9a^2 b - 27ab^2 + 4ab - 12b^2

Level: beginning/elementary algebra

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