[(-3ab)²×a³+2a³×(-3ab)³×1/2b]÷(3a²b²)² ,其中a=1/3,b=-b=-(1/2)
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[(-3ab)²×a³+2a³×(-3ab)³×1/2b]÷(3a²b²)² ,其中a=1/3,b=-b=-(1/2)
[(-3ab)²×a³+2a³×(-3ab)³×1/2b]÷(3a²b²)² ,其中a=1/3,b=-
b=-(1/2)
[(-3ab)²×a³+2a³×(-3ab)³×1/2b]÷(3a²b²)² ,其中a=1/3,b=-b=-(1/2)
[(-3ab)²×a³+2a³×(-3ab)³×1/2b]÷(3a²b²)²
=[-3a^5b^2-3a^6b^2]÷9a^4b^4
=-a/3b^2-a^2/3b^2
=-a/3b^2*(a-1)
=-a/3b^2*0
=0