For which positive integer values of $k$ does $kx^2+20x+k=0$ have rational solutions? Express your answers separated by commas and in increasing order.

-10,10

Step-by-step explanation:

The given quadratic equation is

The discriminant of this equation is given by;

where a=k, b=20, c=k

For rational solutions, the discriminant must be zero.

Simplify to get:

This implies that:

Take square root to get:

b i think

step-by-step explanation:

not really sure

step-by-step explanation: