Number Systems — quick quiz

5 real NSEJS questions on Number Systems. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 1

HARD

If x = (√7 + √5)/(√7 – √5) and y = (√7 – √5)/(√7 + √5), then the value of (x² + y²) is: