4x³ - 2x²+ 1 = 0 D. 1/x + 2 = 0 相关知识点: 试题来源: 解析 B。解析:二次方程(quadratic equation)的一般形式是ax²+bx + c = 0(a≠0),选项B符合这个形式。选项A是一次方程。选项C是三次方程,因为最高次项是x³。选项D是分式方程,不是二次方程的形式。反馈 收藏 ...
百度试题 结果1 题目Which quadratic equation has exactly one real root? ( ) A. -9x^2-6x+1=0 B. 9x^2-6x-1=0 C. 9x^2-6x+1=0 D. 9x^2+6x-1=0 相关知识点: 试题来源: 解析 C 反馈 收藏
Which of the following is the equation of a quadratic function with a vertex at (2,3) and opening upward? A. y = (x - 2)² + 3 B. y = (x + 2)² + 3 C. y = -(x - 2)² + 3 D. y = -(x + 2)² + 3 相关知识点: ...
一题简单的英文版高级数学题.The quadratic equation x^2-x=k(x+1) has non-zero roots which differ by 1.Find the value of (i) each root,(ii)the constant k.翻译:二次方程 x^2-x=k(x+1)具有差别1的非零根.找以下的值(i)各根,(ii)该常数k.可参考原版英文请给我算式我不会做只知道是...
According to the problem, coefficients of the required quadratic equation arereal and its one root is -2 + i.We know in a quadratic with real coefficients imaginary roots occur inconjugate pairs).Since equation has rational coefficients, the other root is -2 - iNow, the sum of the roots ...
百度试题 结果1 题目MULTIPLE CHOICE Which quadratic equation has the solutions x=(-9±√(81-56))/4 A 2x^2+9x-7=0③ 2x^2-9x+7=0⊙4x^2+9x+14=0 2x^2+9x+7=0 相关知识点: 试题来源: 解析 D 反馈 收藏
一题简单的英文版高级数学题.The quadratic equation x^2-x=k(x+1) has non-zero roots which differ by 1.Find the value of (i) each root,(ii)the constant k.翻译:二次方程 x^2-x=k(x+1)具有差别1的非零根.找以下的值(i)各
ait is 54.5 metres tall 它是54.5米高的[translate] a我立即意识到抓紧现在的一分一秒是多么至关重要 I realize the push present a minute second am immediately how very important[translate] awrinkle reducer 皱痕还原剂[translate] asolve this quadratic equation and hence find the pairs (x,y) for w...
Find the value (s) of k for which the given quadratic equations has real and equal roots: (ii)kx(x−2√5)+10=0. (i)9x2+8kx+16=0. k, for which one root of the quadratic equationkx2is x2kxhas equal roots. x NCERT solutions for CBSE and other state boards is a key require...
aA quadratic equation in x with discirminant 一个二次方程在x与discirminant[translate] ait is not easy to describe a policeman's job. after all ,a policeman has a number of jobs in one 描述警察的工作是不容易的。 在所有以后,警察有一定数量的工作在一个[translate] ...