Question

subtracting x2 + y2+z2 from x2 -y2-z2 , the resultant Expression is
a.2x2 b.2y2 c.-2z2 d.0
​

Answer 1

2x-2y-2z-2x+2y+2z

0 is the correct answer hence option d is correct

Answer 2

b). -2z2

please mark me as billarnt

thank my answer