Question

9. Evaluate the following at x =-1, y= -2, z=0 (i ) (x+y+z) ² -x²-y²-z²​

Answer 1

Answer:

—8

Step-by-step explanation:

{(-1)+(-2)+(0)} – (-1)²+(-2)²+(0)²

={-1-2+0}–{1+4+0}

=-3–5

=-8 Answer

Answer 2

Answer:

Answer -- 4

Step-by-step explanation:

Given : x = -1

y= -2

z= 0

(X + Y+ Z) ^2 - x^2- y^2- z^2

or, (-1 +(-2) +0)^2 - (-1)^2-(-2)^2-(0)^2

or, (-1-2+0)^2 - 5

or, (3)^2-5

or, 9-5

or, 4 ( Answer)

l hope it is helpful............