y≤ -х2 +81
А(4;-2), -2< -4² + 81;
В(9; 0), 0-9281, 0<
C(-10; 1), 1 ≤ -100+ 81, 1<
D(11;-11), 11-121+ 81, -1
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y≤ -х2 +81
А(4;-2), -2< -4² + 81;
В(9; 0), 0-9281, 0<
C(-10; 1), 1 ≤ -100+ 81, 1<
D(11;-11), 11-121+ 81, -1