Question

Which of the following is obtained by subtracting x2
-y
2

from y2
- x
2
?

(a) -2(x2
-y
2)

(b) -2(x2
+ y2
)

(c) 2(x2
+ y2)


(d) 2(x2
- y
2) ​

Answer 1

Answer:

?

(a) -2(x2

-y

2)

(b) -2(x2

+ y2

)

(c) 2(x2

+ y2)

(d) 2(x2

- y

2)