Question

If x = (2 + root 5 )to the power 1 / 2 + (2 - root 5 )to the power 1 / 2 and y = (2 + root 5 )to the power 1 / 2 -(2 - root 5 )to the power 1 / 2 then evaluate x square and y square.

Answer 1

xsquare=real number,ysquare=realnumber