Attempt the question, check the explanation, and continue with similar questions to build confidence before exams.
x²/25 - y²/20 = 1
x²/10 - y²/25 = 1
x²/20 - y²/25 = 1
x²/25 - y²/50 = 1
Continue with nearby questions to strengthen the same chapter concept while you still have the context fresh in mind.