What Two Numbers When Multiplied Equals -200 But When Added Together Equals 17?

X*y=-200,
x+y=17,x=17-y,
y^2-17y-200=0,
y=(17-(1089)^1/2)/2,x=(17+(1089)^1/2)/2,
two numbers are (17-(1089)^1/2)/2  and (17+(1089)^1/2)/2