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let k be a constant,if A and B are the roots of the equation x2 - 3x +k = 0,the A2 + 3B = ?k 是恒数,如果A和B是x 2- 3x+ k= 0的根,A2 + 3B = ? 相关知识点: 试题来源: 解析 因为A和B是x 2 - 3x+ k= 0的两个根,所以A+B=3,即B=3-A将B带入A2 + 3B 原式转化为...
Learn what makes an equation quadratic and what does a quadratic equation looks like. See some examples of a quadratic equation. Related to this QuestionHow do you solve a quadratic equation? Solve the quadratic equations: (a) x^2 - 40x + 40 = 0 (b) 6x^2 - 4x + 6 = 0 How do ...
Question: What is the quadratic equation? Mathematical Equations: Equating two mathematical expressions using "=" symbol forms a mathematical equation. For example -x2−4=0 There are many types of equations, for example - Linear equation , quadratic equation etc. ...
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Quadratics are the polynomial equation which has highest degree of 2. Also, called quadratic equations. Learn quadratic formulas, solution to quadratic equations with the example at BYJU'S.
A. ax+b=0 B. ax²+bx+c=0 C. ax³+bx²+cx+d=0 D. ax⁴+bx³+cx²+dx+e=0 相关知识点: 试题来源: 解析 B。“quadratic equation”是二次方程,其形式为 ax²+bx+c=0。选项 A 是一元一次方程。选项 C 是三次方程。选项 D 是四次方程。反馈 收藏 ...
A. an equation of degree one B. an equation of degree two C. an equation of degree three D. an E. quation of degree F. our 相关知识点: 试题来源: 解析 B。“quadratic equation”是指二次方程。选项 A 是“一次方程”。选项 C 是“三次方程”。选项 D 是“四次方程”。反馈...
x = −0.39 makes no sense for this real world question, but x = 10.39 is just perfect!Answer: Boat's Speed = 10.39 km/h (to 2 decimal places)And so the upstream journey = 15 / (10.39−2) = 1.79 hours = 1 hour 47min...
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