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