If the roots of the quadratic equation `x^2-4x-log_3a=0` are real, then the least value of a is

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

If the roots of the equation x^(2)-4x-log_3 a=0 , are real , the least value of a is :

If the roots of the equation x^(2)-4x-log_3 a=0 , are real , the least value of a is :

The real roots of the quadratic equation x^(2)-x-1=0 are ___.

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

If the roots of the quadratic equation x^(2) - 4x- log_(10) N= 0 are all real, then the minimum value of N is

If the roots of the quadratic equation x^(2)-2kx+2k^(2)-4=0 are real,then the range of the values of k is

Roots of quadratic equation x^(2)-4x+3=0 are