计算:(1)(a﹣b) 3 ÷(b﹣a) 2 +(﹣a﹣b) 5 ÷(a+b) 4 =( ).(2)已知:x m =3,x n =2

2025-05-09 03:41:28
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回答1:

解:(1)(a﹣b) 3 ÷(b﹣a) 2 +(﹣a﹣b) 5 ÷(a+b) 4
=(a﹣b) 3 ÷(a﹣b )2 ﹣(a+b) 5 ÷(a+b) 4
=(a﹣b)﹣(a+b),
=a﹣b﹣a﹣b,
=﹣2b;
(2)x 3m+2n
=(x m 3 ×(x n 2
=3 3 ×2 2
=108.
故答案为:(1)﹣2b.(2)108.