计算下列各式,并把结果化为正整数指数幂的形式.(1)a 2 b 3 (2a -1 b 3 );(2)(a -2 ) -3 (bc

2024-11-23 14:57:52
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回答(1):

(1)a 2 b 3 (2a -1 b 3 )=2a 2-1 b 3+3 =2ab 6

(2)(a -2 -3 (bc -1 3
=a 6 b 3 c -3
=
a 6 b 3
c 3


(3)2(2ab 2 c -3 2 ÷(ab) -2
=2(4a 2 b 4 c -6 )÷(a -2 b -2 ),
=8a 4 b 4 c -4
=
8a 4 b 4
c 4