Question

If x = √3 + 1

√3 −1

, y =

√3 − 1

√3+ 1

, find the value of x2

+ xy – y

2

.​

Answer 1

Answer:

the value of x2 is 4 because 2×2=4

Answer 2

Answer:

From the picture we have x=2+3 and y=2−3.

Then, 

x2+y2

={4+3+23}+{4+3−23}

=7+7

=14.