来自成海的问题
去括号:-(x-3)-3(y-3z)kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
去括号:-(x-3)-3(y-3z)
kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
3回答
2020-04-20 00:53
去括号:-(x-3)-3(y-3z)kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
去括号:-(x-3)-3(y-3z)
kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
=-x+3-3y+9z
您确定吗能说说原因吗?谢谢
确定,相当于乘法分配律-1*(x-3)+[-3*(y-3z)]