<span>x^2-11x+24≥0
x1+x2=11 U x1*x2=24
x1=3 x2=8
+ _ +
---------------[3]---------------[8]---------------
x</span>∈(-∞;3] U [8;∞)
5x+13<0 5x<-13 x<-13/5=-2.6
<span>x+5>1 x>-4 чЮ-4
x=(-4 -2.6)</span>
(x-3)(x+7)-13=(x+8)(x-4)-2
x^2+7x-3x-21-13=x^2-4x+8x-32-2
x^2+4x-34=x^2+4x-34
0=0
x-любое
================================
(3+4y)(4y-3)-16²
16y²-9-256
16y²-265