1.

9a2- 4b2-3a -2b

Answer»

9a² - 4b² - 3a - 2b

(3a)² - (2b)² - ( 3a + 2b)

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

Take (3a - 2b) common

(3a - 2b) ( 3a + 2b - 1)

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