(2a-2b)²-2(2a+3b)(2a-3b)+(2a+3b)²其中:a=-2,b=3分之1.是2014
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(2a-2b)²-2(2a+3b)(2a-3b)+(2a+3b)²其中:a=-2,b=3分之1.是2014
(2a-2b)²-2(2a+3b)(2a-3b)+(2a+3b)²其中:a=-2,b=3分之1.
是2014
(2a-2b)²-2(2a+3b)(2a-3b)+(2a+3b)²其中:a=-2,b=3分之1.是2014
=1-7+3×1+5-(-2)²
=1-7+3+5-4
=-2