Question

27.The sum of x² – y², y² – z² and z² – x² is *
a.
$3x {}^{2}$
b.
$3y { }^{2}$
c.
$3z {}^{2}$
d. 0
e. 1​

Answer 1

Answer:

answer is

Step-by-step explanation:

d. 0 is the correct

Answer 2

Answer:

The sum of x² – y², y² – z² and z² – x² is

Step-by-step explanation:

(x²-y²)+(y²-z²)+(z²-x²)

=x² – y²+ y² – z²+ z² – x² = x²-x²-y²+y²-z²+z²=0