y²+7y+10=0;
D=49-40=3²;
y₁=(-7-3)/2=-5;
y₂=(-7+3)/2=-2;
x₁=7+y₁=7-5=2;
x₂=7+y₂=7-2=5;
ответ:(2;-5)U(5;-2).