If a:b=c:d then find the value of a²+b²/c²+d² is
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a/b=c/d
a²/b² = c²/d²
Using componendo,
(a²+b²)/(a²-b²) = (c²+d²)/(c²-d²)
(a²+b²)/(c²+d²) = (a²-b²)/c²-d²)
a²/b² = c²/d²
Using componendo,
(a²+b²)/(a²-b²) = (c²+d²)/(c²-d²)
(a²+b²)/(c²+d²) = (a²-b²)/c²-d²)
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