" 6.Write the set of values of a' for which the equation "x^(2)+ax-1=0" has real roots."

Write the set of values of a'a' for which the equation x^(2)+ax-1=0 has real roots.

Write the set of values of ' a ' for which the equation x^2+a x-1=0 has real roots.

Write the set of values of k for which the quadratic equation has 2x^2+k x-8=0 has real roots.

Write the set of values of k for which the quadratic equation has 2x^(2)+kx-8=0 has real roots.

Let A is set of all real values of a for which equation x^(2)-ax+1=0 has no real roots and B is set of al real values of b for which f(x)=bx^(2)+bx+0.5gt0AAxepsilonR then AcapB=

Is there any real value of 'a' for which the equation x^(2)+2x+(a^(2)+1)=0 has real roots?

The value of m for which the equation x^(2)-x+m^(2)=0 has no real roots is given as

Complete set of real values of 'a' for which the equation x^4-2ax^2+x+a^2 -a=0 has all its roots real