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Sticky Note
(3a - 2b)² = 9a² - ______ +4b².
  1. 6ab
  2. 12ab
  3. -12ab
  4. None of these
Explanation

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

= 9a² - 12ab + 4b²

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