(√(5+2√6))^|x|+(√(5-2√6))^|x|=10
(√(5-2√6))^|x|=1/(√(5+2√6))^|x|
(√(5+2√6))^|x|+1/(√(5+2√6))^|x|=10
(√(5+2√6))^|x|=a
a+1/a-10=0
a²-10a+1=0,a≠0
D=100-4=96
√D=4√6
a1=(10-4√6)/5=5-2√6⇒(√(5+2√6))^|x|=5-2√6⇒|x|/2=-1 ⇒|x|=-2нет решения
a2=5+2√6⇒(√(5+2√6))^|x|=5+2√√6⇒⇒|x|/2=1⇒|x|=2⇒x=-2 U x=2
-2*2=-4
Ответ Г