4х²-2=0
4х²=2
х²=2/4
х²=0.5
х=√0.5
х=-√0.5
a(b^2+a^2-ab)/b(a^3+b^3)=a/(a+b)*b
m(m^3-1)/2(m^2+m+1)=m(m-1)/2
(a+2)^3/(a+2)^2=a+2
<span>log(0,3)10-log(0,3)3 =
=</span>log(0,3)10/3 = log(0,3) (3/10)^-1 = -1 log(0,3) 0,3 = -1 *1 = -1
<em>18=2х+28
-2х=18-18
2х=-18+18
2х=0
х=0</em>