Question

The value of k for which the roots of the equation x^2+4x+k=0 are real is 1.k=4 2.k˂4 3.k˃4 4.k⦤4

Answer 1

Step-by-step explanation:

For a quadratic equation ax2+bx+c=0 to have equal roots, D=b2−4ac=0

∴D=b2−4ac=(−4)2−4(1)(k)=0

∴k=4

So, the answer is option (C)