已知:A=-2^5,B=2^5,求A^2-2AB+B^2和A^3-3A^2B+3AB^2-B^3_数学解答

已知:A=-2^5,B=2^5,求A^2-2AB+B^2和A^3-3A^2B+3AB^2-B^3

人气：378 ℃　时间：2020-04-05 09:47:12

解答

A^2-2AB+B^2
=(A-B)^2=(-2*2^5)^2=(2^6)^2=2^12
A^3-3A^2B+3AB^2-B^3
=(A-B)^3=(-2*2^5)^3=(-2^6)^3=-2^18