factorise give full solution
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4x² - 9y² - 2x - 3y
= (2x)² - (3y)² - 2x - 3y
= (2x+3y)(2x-3y) - 2x - 3y
= (2x)² - (3y)² - 2x - 3y
= (2x+3y)(2x-3y) - 2x - 3y
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