5/(√6 -1) -5/(√6 +1) =(5(√6 +1) -5(√6 -1)) /(√6 -1)(√6 +1) =(5√6 +5 -5√6 +5) /(√6^2 -1) =10 /(6 -1) =10/5 =2
Х=5-у
у²+4ху=33
х=5-у
у²+4у(5-у)-33=0
у²+20у-4у²-33=0
-3у²+20у -33=0
3у²-20у+33=0
D/4=10² - 3*33=1
у1=(10-1)/3=3
у2=(10+1)/3=3 2/3
у1=3 у2=3 2/3
х1=5-3 х2=5 - 3 2/3
у1=3 у2=3 2/3
х1=2 х2=1 1/3