(log5(2)+log2(5)+2)*(log5(2)-lg2)*log2(5)-log5(2)=
1ая скобка (log5(2)+log2(5)+2)=(log5(2))^2+1+2log5(2)) / log5(2)
2ая скобка (log5(2)-lg2)=1 / log2(5)-1 / (log2(5)+1)=(log2(5)+1-log2(5)) / (log2(5)*(log2(5)+1)=1 / (log2(5) * (log2(5)+1)
3 действие log2(5) * 1 / (log2(5)*(log2(5)+1)=1 / (log2(5)+1) = log5(2) / (1+log5(2))
4 действие (log5(2))^2+1+2log5(2)) / log5(2) * log5(2) / (1+log5(2))=
(log5(2))^2+1+2log5(2)) - квардрат суммы
= (log5(2)+1)^2 / (log5(2)+1) = log5(2)+1
log5(2)+1-log5(2) = 1
ответ: 1.
8/х=х/2
х²=16
х1=4
х2=-4
у1=8/4=2
у2=8/(-4)=-2
ответ:(4;2);(-4;-2)