विस्तार करा: (2a - 3b)²
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विस्तार करा: (2a - 3b)²
उत्तरः
सुत्र: (a - b)² = a² + b² - 2ab
=> (2a - 3b)²
=> (2a)² + (3b)² + 2(2a)(3b)
=> 4a² + 9b² + 12ab
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