Question

if x = root 3 -root 2upon root 3+root 2 and y = root 3 +root 2 upon root 3 -root 2, find the value of x square + ysquare -5 xy

Answer 1

first rationalise for x
you will get 5-2root6
then rationalise for y
you will get 5+2root6
the subsitute the value of x and y in
x square+y square -5xy
when this will be solved you will get 93 answer