Expand : ( 2a - 3b )²
4a² + 12ab + 9b²
4a² - 12ab + 9b²
4a² - 12ab - 9b²
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Answer:
(2a - 3b)²
= (2a)² + (3b)² - 2 × 2a × 3b
= 4a² - 12ab + 9b²
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