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Mathematics 21 Online
OpenStudy (anonymous):

Factor 9b² - 4. a) (3b + 1)(3b - 4) b) (3b + 2)(3b - 2) c) (3b - 2)(3b - 2)

OpenStudy (anonymous):

(3b + 2)(3b - 2)

OpenStudy (anonymous):

9b^2 is a perfect square of 3b 4 is a perfect square of 2

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