Question

x2-[x2-{x2-(x2-z2)-2z2}+z2]

Answer 1

Answer:

X²+z²+2xz

We know that

(a+b)²= a²+b²+2ab

Here also,

(x+z)²=x²+z²+2xz

Therefore, answer should be (x+z)²

Answer 2

Answer:

$hello$

x² + z² + 2xz

= x² + 2xz + z²

Now splitting the middle term.

= x² + xz + xz + z²

= x( x +z) + z ( x + z)

= ( x + z) ²

Hope helped!