Arithmeticeasy · Past Paper
If $x:y = 2:1$, then $(x^2-y^2) : (x^2+y^2)$ is:
A3:5
B5:3
C1:3
D3:1
✓ Correct Answer: A — 3:5
x=2, y=1 => (4-1)/(4+1) = 3/5.
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