I don't really know what the question is asking for,

is the answer a number or a range because what I did is jut do b^2-4ac-=0

because the question said a real solution so m^2-4*1*m=0

m=4 or m=0

is that the answer or I did something wrong ,

I am just confused at what the answer should be 

Range or Number?

Thank you so much