方程2x(x-1)=3(x+3)-4化为一般形式是( ),其中b2-4ac=( )。的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键将文档转化为在线题库手机刷题,以提高学习效率,是学习的生产力工具
//answers.microsoft.com/en-us/outlook_com/forum/all/outlook-multiple-delegates/e7445096-bdf7-4ac1-ae71-91047a22a0fe 2021-09-30T16:49:31.0000000Z https://answers.microsoft.com/en-us/windows/forum/all/computer-wont-boot-from-sleep-mode-at-all/e249b5d1-a668-40e6-a267-413284499699 2021-04...
意思是b^2-4ac是在根号下的，所以这是方程的根是实根还是虚根的标志
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为了求解这个一元二次方程,我们可以运用韦达公式(Vieta"s Formula),也称为求根公式。求根公式为: x1,2 = (-b ±√(b - 4ac)) / (2a) 接下来,我们来推导这个公式。 首先,将方程ax + bx + c = 0两边同时除以a,得到: x + (b/a)x + (c/a) = 0 然后,我们将这个方程看作一个完全平方的形式...
2. Quadratic formula: x = (-b±sqrt(b²- 4ac)) / 2a, used to solve quadratic equations of the form ax²+ bx + c = 0. 3. Distance formula: d = sqrt((x2 - x1)²+ (y2 - y1)²), used to find the distance between two points in a plane. 4. Slope-intercept formula...
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