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koles0
@koles0
July 2022
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1) 5x^ 2+3x-8 меньше 0
2) 7(3x+1)^2+5 больше или равно 5
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Emptiness1998
1)5х^2+3х<8
х(5х+3)<8
х<8 5х+3<8
5х<8-3
5х<5
х<1
2)7(6х^2+2x+1)>=0
42x^2+14x+7>=0
14x(3x+1)>=-7
14x>=-7 3x>=-8
x>=-0.5 x>=-2.6
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Answers & Comments
х(5х+3)<8
х<8 5х+3<8
5х<8-3
5х<5
х<1
2)7(6х^2+2x+1)>=0
42x^2+14x+7>=0
14x(3x+1)>=-7
14x>=-7 3x>=-8
x>=-0.5 x>=-2.6