Question

. If x = √2−1 √2+1 , y = √2+1 √2−1 , then find the value of x2 +5xy+y2

Answer 1

Answer:

x=5+35−3

x=5+35−3×5−35−3=25+3−215=4−15

y=5−35+3

y=5−35+3