Mathematics · Ratio and Proportion
If (x + y) : (x - y) = 23 : 3, what is the value of (x2 - y2) / (x2 + y2)?
- 1269 / 69
- 269 / 269✓
- 3165 / 269
- 4269 / 165
Correct answer
69 / 269
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