a ∶ b = 2 ∶ 3 అయితే, (b 2 + 2a 2 ) ∶ (b 2 - 2a 2 ) విలువ ఎంత?

1
17 ∶ 1
2
20 ∶ 11
3
18 ∶ 1
4
15 ∶ 2

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