The roots of the quadratic equation $(2x+b+a)(2x+b+a)$ $(2x+b-a)(2x+b-a)$ = 0 are

The roots of the equation $\sqrt{2x^2+9}=9\backslash sqrt\{2x^2+9\}=9$ are

The value of k for which 3 is a root of the equation $k{x}^2-7x+3=0kx^2-7x+3=0$ is

The two roots of a quadratic equation are 2 and – 1. The equation is

Which constant must be added and subtracted to solve the quadratic equation $9x^2+3x-8=09x^2+3x-8=0$ by the method of completing the square ?

If the sum of the roots of the quadratic equation $3x^2+(2k+1)x-(k+5)=03x^2+(2k+1)\backslash ,x-(k+5)=0$ is equal to the product of the roots, then the value of k is

The quadratic equation whose one root is $3+\sqrt{5}3+\backslash sqrt\{5\}$ is

If the two roots of the two quadratic equations $x^2+mx+1=0x^2+mx+1=0$and $a{x}^2+bx+a=0ax^2+bx+a=0$ are common, then the value of m is

The roots of the quadratic equation $x^2+8x+7x^2+8x+7$ = 0 are

The value of k for which roots of the quadratic equation $k{x}^2+2x+3=0kx^2+2x+3=0$ are equal is ……