1.

7. Which of the following is obtained by subtracting x²-y² from y²-,x²?​

Answer»

ANSWER:

2(x^2-y^2)

Step-by-step EXPLANATION:

x^2-y^2-(y^2-x^2) = x^2-y^2-y^2+x^2

                               =2x^2-2y^2

                               =2(x^2-y^2)

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