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leaneliaa
@leaneliaa
July 2022
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Vas61
X²-x-6≥0
x²-x-6=0
x₁+x₂=1 x₁x₂=-6
x₁=-2 x₂=3 ___+___|-2____-___|3___+___
//////////////// ////////////// x∈(-∞;-2]∪[3;+∞)
x²+4x-5<0
x²+4x-5=0
x₁+x₂=-4 x₁x₂=-5
x₁=-5 x₂=1 ___+____|-5___-____|1___+_____
//////////////////// x∈(-5;1)
решешием системы будет пересечение этих промежутков x∈(-5;-2]
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Answers & Comments
x²-x-6=0
x₁+x₂=1 x₁x₂=-6
x₁=-2 x₂=3 ___+___|-2____-___|3___+___
//////////////// ////////////// x∈(-∞;-2]∪[3;+∞)
x²+4x-5<0
x²+4x-5=0
x₁+x₂=-4 x₁x₂=-5
x₁=-5 x₂=1 ___+____|-5___-____|1___+_____
//////////////////// x∈(-5;1)
решешием системы будет пересечение этих промежутков x∈(-5;-2]