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vladmoso
@vladmoso
July 2022
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Надо решить через дескроминант
1) 0. 5в квадрате + 1, 2х-6. 5=0
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Verified answer
0,5х²+1,2х-6,5 = 0
а=0,5; b=1,2; с= -6,5
D = b²-4ac = 1,2²-4*0,5*(-6,5) = 1,44+13 = 14,44
√D = √14,44 = 3,8
х₁ = (-b-√D)/2a = (-1,2-3,8)/(2*0,5) = -5/1 = -5
х₂ = (-b+√D)/2a = (-1,2+3,8)/(2*0,5) = 2,6/1 = 2,6
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Answers & Comments
Verified answer
0,5х²+1,2х-6,5 = 0а=0,5; b=1,2; с= -6,5
D = b²-4ac = 1,2²-4*0,5*(-6,5) = 1,44+13 = 14,44
√D = √14,44 = 3,8
х₁ = (-b-√D)/2a = (-1,2-3,8)/(2*0,5) = -5/1 = -5
х₂ = (-b+√D)/2a = (-1,2+3,8)/(2*0,5) = 2,6/1 = 2,6