Arithmetichard · Past Paper
If (x+y):(x-y) = 4:1, find (x^2+y^2):(x^2-y^2).
A17:8
B8:17
C5:3
D16:1
✓ Correct Answer: A — 17:8
x/y = (4+1)/(4-1) = 5/3. (25+9)/(25-9) = 34/16 = 17/8.
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