х² + bх − 12 = 0 х₁=-3
х₁+х₂=-12 по т. Виета
-3+х₂=-12 х₂=-9
х₁*х₂=-b -3*(-9)=27 b=-27
x²-27x-12=0
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х² + bх − 12 = 0 х₁=-3
х₁+х₂=-12 по т. Виета
-3+х₂=-12 х₂=-9
х₁*х₂=-b -3*(-9)=27 b=-27
x²-27x-12=0