Question

On subtracting x² - y² from y² - x², we get ​

Answer 1

Answer:

$y {}^{2} - x {}^{2} - (x {}^{2} - y {}^{2} ) \\ = y {}^{2} - x {}^{2} - x {}^{2} + y {}^{2} \\ = 2y {}^{2} - 2x {}^{2}$

Answer 2

Answer:

2(y²-x²)

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