4n-2n = n^2 + 1
n^2+ 2n--1=0
D(дискременант)= 4 -4= 0
n= -2:2= -1
(2m-8m)+(6n-3n)=-6m+3n=3(n-2m)
(x-5)(3x-9)(7-x)<span>≤0
x-5</span><span>≤0
</span>x<span>≤5
3x-9</span><span>≤0
x</span><span>≤3
7-x</span><span>≤0
-x</span><span>≤-7 (*-1)
x</span><span>≥7</span>
<span> y=√64-x²/2-x
x<>2
(8-x)(8+x)>=0
=========-8==============8=======
----------------- +++++++++++ ---------
x=[-8 2)U(2 8] </span>