Question

simplify (x²+y²-z)²-(x²-y²+z²)²​

Answer 1

Step-by-step explanation:

Use identity a² - b²

( x²+y²-z² + x²-y²+z²)(x²+y²-z²-x²+y²-z²)

(2x²)(2y² - 2z²)

4x²y² - 4x²z²

4x²(y²-z²)

Answer 2

Step-by-step explanation:

by using a²-b²= (a+b)(a-b) you can get the answer