<span>x^2-11x+24≥0
x1+x2=11 U x1*x2=24
x1=3 x2=8
+ _ +
---------------[3]---------------[8]---------------
x</span>∈(-∞;3] U [8;∞)
Выносим x
x×(6-2x)/2x-6
выносим минус за скобки
x×(-(-6+2x))/2x-6
сокращаем
x×(-1)=-x
2( x - 6) = 18 - 3x
2x - 12 = 18 - 3x
2x + 3x = 18 + 12
5x = 30
x = 6
5(x-1)(x+2/5) (x-1)(5x+2) x-1
------------------= --------------------- = ------------
x(5x+2) x(5x+2) x
(1/19 -1) -18/19
---------------- = -------------------- = -18
1/19 1/19