Question

9. Evaluate the following at x=-1, y = -2. z = 0 : (ii) (x + y)² – (y + z)²– (x + z)² – 3 xyz +4​

Answer 1

Answer:

-2 is the correct answer.

Step-by-step explanation:

(x+y)²-(y+z)²-(x+z)²-3 xyz+4

(-1+-2)²-(-2+0)²-(-1+0)²-3(-1)(-2)(0)

(-3)²-(-2)²-(-1)²-3×2

9-4-1-6

-2

Answer 2

Answer:

8

Step-by-step explanation

$(-1+-2)^{2} -(-2+0)^{2} -(-1+0)^{2} -3xyz+4$

(-3)² – (-2)²– (-1)² – 3xyz +4​

9-4-1-3xyz+4

5-1-3xyz+4

4-3xyz+4

4-0+4

4+4

8

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