∵x2+x+3=0,
∴x2+x=-3,
x5+3x4+2x3+2x2-10x
=x3(x2+x)+2x4+2x3+2x2-10x
=-3x3+2x4+2x3+2x2-10x
=2x4-x3+2x2-10x
=2x2(x2+x)-3x3+2x2-10x
=-3x3-4x2-10x
=-3x(x2+x)-x2-10x
=9x-x2-10x
=-x2-x
=-(x2+x)
=3.
已知x2+x+3=0,求x5+3x4+2x3+2x2-10x的值.
已知x2+x+3=0,求x5+3x4+2x3+2x2-10x的值.
数学人气:429 ℃时间:2019-10-19 04:13:12
优质解答
我来回答
类似推荐
猜你喜欢
- 1On Sundays there were a lot of children playing in the park,____parents seated together joking.
- 2英语翻译
- 3小刚给小军4元7角后,还比小军多17.2元,小军比小刚钱少,小刚原来比小军多多少元?
- 4The old man began to learn to drive a car at the age of ——
- 5甲乙两艘轮船同时从一个码头向相反方向开出,2.5小时后两船相距130千米.甲船每小时行25千米,乙船每小时
- 6春分的极昼极夜地区各是哪?还有夏至冬至和秋分的极昼夜各是哪啊!
- 7初中英语试题6题讲解,
- 8过双曲线x2a2−y2b2=1 (a>0 ,b>0)的左焦点,且垂直于x轴的直线与双曲线相交于M、N两点,以MN为直径的圆恰好过双曲线的右顶点,则双曲线的离心率等于( ) A.3 B.32 C.2 D.43
- 9跪求高手帮忙翻译这篇文章:How to Tell When You're Rich
- 10翻译句子 如果你想提高你的英语,你必须多注意细节