(x2+ax+b)(2x2-3x-1)=2x4-3x3-x2+2ax3-3ax2-ax+2bx2-3bx-b=2x4+(2a-3)x3+(2b-3a-1)x2-(a+3b)x-b,
根据题意得:2a-3=-5,2b-3a-1=-6,
解得:a=-1,b=-4.
故答案为:-1;-4.
在(x2+ax+b)(2x2-3x-1)的积中,x3项的系数为-5,x2项的系数为-6,则a=_,b=_.
在(x2+ax+b)(2x2-3x-1)的积中,x3项的系数为-5,x2项的系数为-6,则a=______,b=______.
数学人气:560 ℃时间:2019-10-18 08:18:03
优质解答
我来回答
类似推荐
猜你喜欢
- 1世界天气预报英文怎么说
- 2在三角形ABC中,已知a=3.b=4.c=根号37,求角C.
- 3英语翻译
- 4翻译She was very tired;however,she went on working at the computer
- 5He is on a visit to our city.He is a ____(visit).
- 6The news is good and we are real happy now单句改错
- 7书上写中心体和有丝分裂有关,但是我就想中心体和减数分裂有关吗
- 8Na2CO3+HClO===Na2SO4+HCl这个反应属于什么反应类型?
- 9什么是涡旋电场
- 10it feels like home when he is by the water 怎么翻译?