a ∶ b = 2 ∶ 3 எனில், (b2 + 2a2) ∶ (b2 - 2a2) இன் மதிப்பு என்ன?

1
17 ∶ 1
2
20 ∶ 11
3
18 ∶ 1
4
15 ∶ 2

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