For the quadratic equation `4x^2-7kx + 2 = 0` to have real roots, which of the following is always true?

If one root of the quadratic equation x^(2)+ax+b=0 is square of the other root,then which of the following always true?

4x^(2) + kx - 2 = 0 has no real roots if…..

The quadratic equation 2x^(2) + x + 4 has ………real roots

The roots of the quadratic equation 3x^2+7x+4=0 are

If the roots of the quadratic equation x^(2) +2x+k =0 are real, then

If the equation x^(2)-kx+1=0 has no real roots then

Value of k for which the quadratic equation 2x^(2) + kx + 8=0 have equal roots, are……

Find the value of k if the quadratic equation kx^2 -12x + 4 = 0 have equal roots.