Question

.Which of the following is obtained by

subtracting x^2-y^2from y^2-x^2?

I.-2(x^2-y^2)

II.-2(x^2+ y^2)
III.2(x^2+ y^2)
IV.2(x^2-y^2)​

Answer 1

Answer:

iii .is the correct option

Answer 2

Answer:

X*x-y*y=y*y-x*X

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

2x^2-2y^2

2(x^2-y^2)