2x(3x+5y)-5y(2x-3y)
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2x(3x + 5y) - 5y(2x - 3y)
=> 2x(3x) + 2x(5y) - [5y(2x) - 5y(3y)]
=> 6x² + 10xy - [10xy - 15y²]
=> 6x² + 10xy - 10xy + 15y²
=> 6x² + 15y²
=> 3(2x² + 5y²)
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