Teaching DSSSB PRT Special Educator Mock Test Quantitative Aptitude Algebra Identities

If x = √3 - 1 and y = √3 + 1 then (x4 - y4)/ (x + y)2 is equal to ?

1

4√3/9

2

9/4√3 

3

-4√3/3

4

-8√3/3

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