己知|x+1|=4，(y+2)的平方=4，求x+y的值.
1个回答
展开全部
|x + 1| = 4, x + 1 = ±4, x = 3, x = -5
(y + 2)² = 4, y + 2 = ±2, y = 0, y = -4
(1) x = 3, y = 0, x + y = 3
(2) x = 3, y = -4, x + y = -1
(3) x = -5, y = -4, x + y = -9
(4) x = -5, y = 0, x + y = -5
(y + 2)² = 4, y + 2 = ±2, y = 0, y = -4
(1) x = 3, y = 0, x + y = 3
(2) x = 3, y = -4, x + y = -1
(3) x = -5, y = -4, x + y = -9
(4) x = -5, y = 0, x + y = -5
追问
谢了
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
