Please Answer This Maths Problem With Steps
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(3a+2b)²-4(3a+2b)(a+2b)+4(a+2b)²
==》【(3a+2b)-4(a+2b)】²
==》【3a+2b-4a-4b】²
==》【-a-2b】²
==》 -a²-2b+4ab
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