【题目】What is the equation of the quadratic functionwith a vertex at (2-25) and an x-intercept at(7,0)? (A.f(x)=(x-2)(x-7)B.f(x)=(x+2)(x+7)C.f(x)=(x-3)(x+7)D.f(x)=(x+3)(x-7) 相关知识点: 试题来源: ...
结果1 题目 What is the equation of the quadratic function with a vertex at (2,-25) and an x-intercept at (7,0)? ( ) A. f(x)=(x-2)(x-7) B. f(x)=(x+2)(x+7) C. f(x)=(x-3)(x+7) D. f(x)=(x+3)(x-7) 相关知识点: 试题来源: 解析 D 反馈 收藏 ...
9For what values of k,does the quadratic equation in one variable x,x2-4x+k-5=0,satisfy the following?(1)It has two distinct real roots;(2)it has two equal real roots;and (3)it has no real roots.9 For what values of k, does the quadratic equation in one variable x,x- 4x+...
【题目】9 For what values of k, does the quadratic equation in one variable x, x^2-4x+k-5=0 ,satisfy the following?(1) It has two distinct real roots;(2) it has two equal real roots; and (3) it has no real roots. 相关知识点: ...
Consider the quadratic equationx2 + y2 + Dx + Ey + F = 0:What condition on the values of D,E and F determines whether this a circle?Use this condition to show thatx2 + y2 ¡ 2x ¡ 4y + 3 = 0is a circle and sketch the circle.Does the point (0:4; 3) lie inside,out...
What is the equation for the axis of symmetry of a quadratic function y = 3x² + 6x + 2? A. x = -1 B. x = -2 C. x = -3 D. x = -4 相关知识点: 试题来源: 解析 A。解析:For the function y = 3x² + 6x + 2, a = 3 and b = 6. Using the formula x = -b/...
What are the values of a, b, and c in the quadratic equation 2x^2 - 7x - 9 = 0? What are the values of a, b, and c in the quadratic equation x^2 - 15 = 0? What are the values of a, b, and c in the quadratic equation 4x^2 - 3x - 7 = 0? What does a represent...
We know that for an equation ax2+bx+c=0, the sum of the roots is −ba. This means that the sum of the roots for ax2−2ax+b=0 is 2aa, or 2. The average is the sum of the two roots divided by two, so the average is 22=1.反馈...
In general, quadratic equations can be solved using the quadratic formula. That said, when there is no middle term (no value of x with a coefficient), we can simply solve for the square root of the value of c to find our answer....
A quadratic equation is one that consists of a single variable with three terms in the standard form ax2 + bx + c = 0. The uses of...