(<span>Х²-5)<span>²+4(<span>Х²-5)+3=0</span></span></span>
1) n(n+6)=n^2+6n
(n+2)(n+4)=n^2+6n+8
Значит, n(n+2)(n+4)(n+6)+16=(n^2+6n)(n^2+6n+8)+16=(n^2+6n)^2+8(n^2+6n)+4^2=
=(n^2+6n+4)^2.
2) n(n+3)=n^2+3n
(n+1)(n+2)=n^2+3n+2
Значит, <span>n(n+1)(n+2)(n+3)+1
=(n^2+3n)</span>^2+2(n^2+3n)+1=(n^2+3n+1)^2.
Лови скан.....................................................................
Log3(x+5)=log3(2x-17)
x+5=2x-17
x-2x=-17-5
-x=-22
x=22
Ответ: x=22