若a的m次方=2,b的n次方=3,则单项式-2a的2m次方b的3n次方的值为多少?

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a的链逗m次方唤扒=2,b的n次方=3

,则单项式-2a的2m次棚链卖方b的3n次方
=-2(a^m)^2(b^n)^3
=-2*2^2*3^3
=-2*4*27
=-216

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