Question

найдите сумму корней уравнения

Answer 1

|8x - 1| = 8,8
8x - 1 = 8,8    или     8x - 1 = - 8,8
8x = 9,8                    8x = - 7,8
x₁ = 1,225                 x₂ = - 0,975

x₁ + x₂ = 1,225 - 0,975 = 0,25

Answer 2

$|8x-1|=8,8 \\ \left \{ {{8x-1=8,8} \atop {8x-1=-8,8}} \right. \left \{ {{8x=9,8} \atop {8x=-7,8}} \right. \left \{ {{x_1=1 \frac{9}{40} } \atop {x_2= -\frac{39}{40} }} \right. \\ x_1+x_2 = 1\frac{9}{40} - \frac{39}{40} = \frac{10}{40} = \frac{1}{4}$