x=7x+12/x+8
7x+12=0 или x+8=0
7x=-12 x=-8
x=1.7
ответ: -8
7X + 12\X + 8 - X = 0
6X + 12\X + 8 = 0
6X^2\X + 12\X + 8X\X = 0
6X^2 + 8X + 12 = 0
2*(3X^2 + 4X + 6) = 0
3X^2 + 4X + 6 = 0
D = 16 - 4*3*6 = 16 - 72 = - 56
D < 0 ---> корней нет
x=7x+12/x+8
7x+12=0 или x+8=0
7x=-12 x=-8
x=1.7
ответ: -8
7X + 12\X + 8 - X = 0
6X + 12\X + 8 = 0
6X^2\X + 12\X + 8X\X = 0
6X^2 + 8X + 12 = 0
2*(3X^2 + 4X + 6) = 0
3X^2 + 4X + 6 = 0
D = 16 - 4*3*6 = 16 - 72 = - 56
D < 0 ---> корней нет