Expand : ( 2a - 3b )²4a² + 12ab + 9b²4a² - 12ab + 9b²4a² - 12ab – InterviewSolution

1.

Expand : ( 2a - 3b )²4a² + 12ab + 9b²4a² - 12ab + 9b²4a² - 12ab - 9b²Please answer urgently

Answer»

(2A - 3B)²

= (2a)² + (3b)² - 2 × 2a × 3b

= 4a² - 12AB + 9b²

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