15a2 + 4b2 47
15a2 - 4b2 7
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what I can do
rewrite the question and ask again
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Correct question :-
➠ (15a² + 4b²)/(15a² - 4b²) = 47/7
Answer :-
➠ (15a² + 4b²)/(15a² - 4b²) = 47/7
➻ 15a² + 4b² + (15a² - 4b²)/15a² + 4b² - (15a² - 4b²) = 47 + 7/47 - 7 [By componendo - dividendo]
➻ 15a² + 4b² + 15a² - 4b²/15a² + 4b² - 15a² + 4b² = 54/40
➻ 15a² + 15a² + 4b² - 4b²/15a² - 15a² + 4b² + 4b² = 54/40
➻ 30a²/8b² = 54/40
➻ a²/b² = 54 × 8/40 × 30
➻ a²/b² = 9/25
➻ a/b = 3/5 [Take square root of both sides]
➻ a/b = 3 : 5
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