Question

x²-y²+z²-x²-y²-z² subtract polynomial​

Answer 1

Answer:

-2y²

Step-by-step explanation:

x²-y²+z²-x²-y²-z²

=-2y²

Answer 2

Answer:

2(x²+z²)

Step-by-step explanation:

=(x²-y²+z²)-(-x²-y²-z²)

=x²-y²+z²+x²+y²+z²

=(x²+x²)+(y²-y²)+(z²+z²)

=2x²+2z²

=2(x²+z²)