摘要：If .then the equation ax + b = 0 for x has only one root.
网址：http://m.1010jiajiao.com/timu3_id_626450[举报]
If a+b=0，then the equation ax+b=0 for x has（英汉小词典：infiniteroots：无穷多个根）
- A.only one root
- B.only one root or no root
- C.only one root or infinite roots
- D.no root or infinite roots
If a2+b2＞0，then the equation ax+b=0 for x has（ ）
| A、only one root | B、no root | C、infinite roots（无穷多个根） | D、only one root or no root |