x+y=-14
xy=-17
y=-x+-14
xy=x(-x-14)=17
x(-x-14)=17
-x2-14x=17
-x2-14x-17=0
When you plug it in you get 14+or-sqrt128 all over -2. That number doesn't come out evenly, so plug both instances into the first equation to get your answer.
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