Which of the following equations has the product of its roots as 4 ?

$a{x}^2+bx+c=0ax^2+bx+c=0$, $aa$ > 0, $b=0b=0$, $cc$ > 0 has;

If the equation $x^2-4x+a=0x^2-4x+a=0$ has no real roots, then

If the discriminant of the quadratic equation $a{x}^2+bx+c=0ax^2+bx+c=0$ is zero, then the roots of the equation ............

The least value of $a{x}^2+bx+cax^2+bx+c$ $(a(a$ > 0) is

The equation $x+\sqrt{x-2}=4x+\backslash sqrt\{x-2\}=4$ has

If one root of the equation $a(b-c)a(b-c)$ $x^2+b(c-a)x^2+b(c-a)$ $x+c(a-b)=0x+c(a-b)=0$ is 1, then the other root is

The roots of the equation $x^2+2\sqrt{3}x^2+2\backslash sqrt\{3\}$ $x+3=0x+3=0$ are

The roots of the equation $a{x}^2+bx+c=0ax^2+bx+c=0$ will be reciprocal if

The discriminant of $a{x}^2-2\sqrt{2}ax^2-2\backslash sqrt\{2\}$ $x+c=0x+c=0$ with a, c are real constants is zero. The roots must be