Question

how it happens please explain​

Answer 1

Answer:

There is an Identity:

a²-b² = (a+b) (a-b)

So, x²-z² = (x+z) (x-z)

0 = (x+z) (x-z)

(because, x²-z² = 0)

Now, x+z = 0 x-z = 0

z = -x -z = -x

z = x

Hope it helped you......