0.01y²=49
0.01y²-49 =0
(0.1y+7)(0.1y-7)=0
∴y1=-70,y2=70
猜你喜欢
- 1表现了居里夫人怎样的精神?玛丽·居里几乎在完成这项伟大自然发现的同时,也完成了对人生意义的发现.
- 2Mary often s____with her mother in the supermarket on Sunday.
- 3TMY 100*10铜排,100米,换算成公斤是多少公斤.
- 4图上20厘米的距离表示实际5毫米,这幅地图的比例尺是多少?
- 5文言文,划分朗读节奏.
- 6English is interesting _________I didn't like it at first A and B so C but D or 应该选哪个?
- 7左边绿,右边红,右边怕水,左边怕虫（打字迷）
- 85年级上册语文书第一单元的习作一怎么写
- 9Is there anything interesting ____the newspaper?
- 10生病难过的感慨句子