Question

Add (2x² + z²) ,( -3x² - z² ), (x² + z²)​

Answer 1

Answer:

2x^2 + z^2

-3x^2- z^2

+x^2 + z^2

―――――――――――

0+z^2

answer is only z^2 because x^2+2x^2= 3x^2

and then we have to a negative -3x^2

so they both are cancelled....