(4x눀y+5xy-7x)-(5x눀y+4xy+x)求解

2025-03-04 05:40:04
推荐回答(1个)
回答1:

解:原式=4x²y+5xy-7x-5x²y-4xy-x=(4x²y-5x²y)+(5xy-4xy)-(7x+x)=-x²y+xy-8x