问题
填空题
方程x2+4x+k=0的一个根是2，那么k的值是______；它的另一个根是______．
答案
设方程另一根为x1，
∵方程x2+4x+k=0的一个根是2，
∴4+4×2+k=0，解得k=-12，
∵x1+2=-4，
∴x1=-6．
故答案为-12，-6．
搜题请搜索小程序“爱下问搜题”
方程x2+4x+k=0的一个根是2，那么k的值是______；它的另一个根是______．
设方程另一根为x1，
∵方程x2+4x+k=0的一个根是2，
∴4+4×2+k=0，解得k=-12，
∵x1+2=-4，
∴x1=-6．
故答案为-12，-6．
| 根据短文内容，用方框中所给的单词填空。 | |
the Asian record with a time of 6'39"71. His fans came to 2 him and asked him whether he liked skating when he was very young. Then he told 3 a story. "In fact,I didn't like skating at all when I was young. On a winter day in December,it snowed 4 and the weather got very cold. I didn't. know how to spend my Saturday. Then I turned on the TV and saw some 5 skating on the lake. I thought, "They're really cool! I will start to skate, too. " Then I put on my coat, took my brother's skating shoes and went out. " "I learned very quickly. A month later, I could skate very well. From then on, I liked it very much. " |