Question

(x²+y²-z²)-(x²-y²+z²)​

Answer 1

Answer:

(x²+y²-z²)-(x²-y²+z²)

x²+y²-z²-x²+y²-z²

2y²-2z²

2(y²-z²)         by a^2-b^2=(a+b)(a-b)

2(y-z)(y+z)

Step-by-step explanation: