Question

X square + kx + 4 = 0 is one root of the equation is 2 then the other ​

Answer 1

Answer:

$x=2$ ( Multiple Root )

Step-by-step explanation:

$x^2+kx+4=0$

The equation is true when $x=2$ is put in.

$2^2+k*2+4=0$

$2k=-8$

∴$k=-4$

The equation is $x^2-4x+4=0$.

$(x-2)^2=0$

∴$x=2$( Multiple Root )

Multiple Root means two same roots.

Quadratic equation has two roots, so it doesn't count as one root.