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lyubovdsheveleva
@lyubovdsheveleva
July 2022
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(х+7,9)(6х-9)=0
Пожалуйста, подскажите,как решать.
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NadDer
(х+7,9)(6х-9)=0
6x
²-9x+47,4x-71,1 = 0
6x²-38,4x-71,1 = 0
D = (-38,4)²-24*(-71,1)
D = 1474,56+1706,4
D = 3180,96
√D = 56,4
x1 = (38,4+56,4)/12 =
7,9
x2 = (38,4-56,4)/12 = -18/12 =
-1,5
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Answers & Comments
6x²-9x+47,4x-71,1 = 0
6x²-38,4x-71,1 = 0
D = (-38,4)²-24*(-71,1)
D = 1474,56+1706,4
D = 3180,96
√D = 56,4
x1 = (38,4+56,4)/12 = 7,9
x2 = (38,4-56,4)/12 = -18/12 = -1,5