The roots of a pure quadratic equation exists only if `"_______"`.

Sum of the roots of a pure quadratic equation is..

Select the pure quadratic equations:

The coefficient of x in a pure quadratic equation is…

The pure quadratic equations in the following is

Find the roots of the following quadratic equations, if they exist, by the method of completing the square: 2x^2 +x-4=0

Find the roots of the following quadratic equations if they exist, by the method of completing the square : 2x^2-7x+3=0 .

Find the roots of the following quadratic equations if they exist, by the method of completing the square : 2x^2+x-4=0 .

Find the roots of the following quadratic equations if they exist, by the method of completing the square : 2x^2+x+4=0 .

Find the roots of the following quadratic equations , if they exists , by the method of completing the square. 2x^(2) + x- 4 =0

Find the roots of the following quadratic equations , if they exists , by the method of completing the square. 2x^(2) +x+4=0