Question

已知a/c/>/a/,化简/a+c/+/b+c/-/a-b/

Answer 1

∵a＜0,ab＞0 ∴b＜0

∵|b|＞|a| ∴b0

∵b0

∴|a+c|+|b+c|-|a-b|

=(a+c)+(b+c)-(a-b)

=a+c+b+c-a+b

=2b+2c

希望Lz审核一下,直接在电脑上面做题目压力好大的赶脚0^0.