<span>2х^2 + 5х<=0
x(2x+5)<=0
x<=0 </span>2x+5<=0
<span> 2x<= -5
x<= -2,5
</span><span>x∈[-2,5; 0]</span>
12+6=18;16+2=2+16=18;13+6=6+13=19 ;11+6=6+11=17;16+1=1+16=17
(1/4)^2=1/16
(3/8)^2=9/64
(5/6)^2=25/36
(2/7)^2=4/49
(3/2)^2=9/4=1 5/4
(37/9)^2=1369/81=16 73/81
(20/3)^2=400/9=44 4/9