2х^2-16х=2х^2-3х+2х-6;
-16х+3х-2х=-6;
-15х=-6;
х=6/15;
х=2/5
Ответ:0,4
7x/8+2=-5/8
7x/8+2=-5/8 |8
7x+16=-5
7x=-5-16
7x=-21
x=-3
Понятно?
=√2·11·64·11=8·11·√2=88√2
\\\\\\\\\\\\\\\\\\\\\\\\\\
=интеграл [lnx*d(x^4+3*x^2-7*x)]={интегрируем по частям}=
= lnx*(x^4+3*x^2-7*x) - интеграл [ (x^4+3*x^2-7*x)*1/x*dx]=
= lnx*(x^4+3*x^2-7*x) - интеграл [ (x^3+3*x-7)*dx]=
= lnx*(x^4+3*x^2-7*x) - (1/4*x^4+3/2*x^2-7*x) + C