Teaching AWES Army Public School TGT Mock Test 2024 Quantitative Aptitude Algebra Identities

If x² + y² = 280 and xy = 120, then find the value of (x - y) / (x + y).

1
(1)/(√(13))
2
√(15)
3
√(13)
4
(1)/(√(15 ))
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