-(5a+b)-4(a-2b)去括号题
问题描述:
-(5a+b)-4(a-2b)去括号题
答
-(5a+b)-4(a-2b)
=-5a-b-4a+8b
=7b-9a
-(5a+b)-4(a-2b)去括号题
-(5a+b)-4(a-2b)
=-5a-b-4a+8b
=7b-9a