Harvard University Admission Interview Trick X^2-Y^2=20 | You Should Know This Trick

[@MathildePerrin-gr2rn]

Just intuitively: x=6 y=4

[@1959Berre]

It took me 3 seconds

[@nigellbutlerrr2638]

6 🎉4🎉

[@walterwen2975]

Harvard University Admission Interview: x² - y² = 20, x, y ϵ Z; x, y =?
x² > 20 > y²; x, y are positive real numbers
x² - y² = 20 = (2)(10) = (6 - 4)(6 + 4) = 6² - 4²; x = 6, y = 4
Answer check:
x² - y² = 20; Confirmed as shown
Final answer:
x = 6, y = 4