12. (3x + 2y)2 – (2x – 3y)2
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Step-by-step explanation: Here is the explanation
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Step-by-step explanation:
(3x + 2y)2 - (2x -3y)2
6x + 4y - 4x + 6y
6x - 4x + 4y +6y
2x + 10y is the answer.
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