Замена: (5+2√6)^x=t 1/(5+2√6)= (5-2√6)/(25-24)=5-2*√6 (5-2√6)^x=1/t t+1/t=10 t²-10t+1=0 D=100-4=96=(4√6)^2 t=(10+-4√6)/2 t1=5+2√6 t2=5-2√6 1) (5+2√6)^x=5+2√6 x=1 2) (5+2√6)^x=5-2√6 x=-1 Ответ:x=+-1