1/2a-(2a-2/3b^2)+(-3/2a+1/3b^2)化简
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1/2a-(2a-2/3b^2)+(-3/2a+1/3b^2)化简
1/2a-(2a-2/3b^2)+(-3/2a+1/3b^2)化简
1/2a-(2a-2/3b^2)+(-3/2a+1/3b^2)化简
1/2a-(2a-2/3b^2)+(-3/2a+1/3b^2)
=1/2a-2a+2/3b²-3/2a+1/3b²
=-3a+b²
-3a+b^2