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本试卷检测范围:初中代数第十二章一元二次方程第一节一元二次方程至第八节无理方程。 一、填空题(每空2分,共24分)1.方程6x~2=3-7x的二次项系数、一次项系数和常数项分别是____。2.用直接开平方法解方程9x~2-4=0的根是___;(x+1)~2=2的根是_____。3.若代数式(x+1)(3x-2)的值是零,则x等于___。4.当k___时,方程kx~2+2x+3=0有两个相等的实数根。
The test scope of this paper is: the junior high school algebra, the twelfth chapter, the one-dimensional quadratic equation, the first quarter, the one-element quadratic equation, and the eighth irrational equation. First, fill in the blank (2 points for each, a total of 24 points) 1. Equation 6x~2=3-7x The quadratic coefficient, the first term coefficient, and the constant term are respectively ____. 2. The root of the equation 9x~2-4=0 is solved by the straight-opening method. The root of (x+1)~2=2 is _____. 3. If the value of the algebraic formula (x+1)(3x-2) is zero, then x equals ___. 4. When k___, the equation kx~2+2x+3=0 has two equal real roots.