一元二次方程的解集及其根与系数的关系
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1.通过对一元二次方程的 解集及根与系数的关系的
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1.一元二次方程的定义 形如 ax2+bx+c=0 的方程为一元二次方程,其中 a,b,c 是 __常__数___,且 a≠0.
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2.一元二次方程的解法
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预
习
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源自文库
探新知
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等式与不等式
等式
一元二次方程的解集及其根与系数的关系
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学习目标
核心素养
1.理解一元二次方程的定义,并会求一元
二次方程的解集.(重点) PPT模板:www.1ppt.com/moban/ PPT背景:www.1ppt.com/beijing/ PPT下载:www.1ppt.com/xiazai/ 资料下载:www.1ppt.com/ziliao/ 试卷下载:www.1ppt.com/shiti/ PPT论坛:www.1ppt.cn
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(1)直接开平方法:利用平方根的定义直接开平方求一元二次方 PPT下载:www.1ppt.com/xiazai/ 资料下载:www.1ppt.com/ziliao/ 试卷下载:www.1ppt.com/shiti/ PPT论坛:www.1ppt.cn 语文课件:www.1ppt.com/kejian/yuw en/ 英语课件:www.1ppt.com/kejian/ying yu/ 科学课件:www.1ppt.com/kejian/kexu e/ 化学课件:www.1ppt.com/kejian/huaxue/ 地理课件:www.1ppt.com/kejian/dili/
2.掌握一元二次方程的根的判别式,并会 学习,培养数学抽象、逻
用其判断根的个数.(重点)
辑推理的数学素养.
3.掌握一元二次方程的根与系数的关系, 2.通过求一元二次方程的
并会用其求一些关于方程两根的代数式的
值.(重点、难点)
解集,提升数学运算素养.
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自
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