Question

By subtracting x²-y² from y²-x² the result

Answer 1

Step-by-step explanation:

see the screenshot please

Answer 2

Step-by-step explanation:

( y^2- x^2)- (x^2- y^2)

y^2 -x^2 -x^2 +y^2

( opening the brackets )

y^2+y^2 -x^2-x^2

= 2y^2 -2x^2

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