Question

for x = -2, y = -1, z = 3:
x2 + y2 +22 – xy – yz – zx
​

Answer 1

Answer:

21

Step-by-step explanation:

(-2)2+(-1)2+(3)2-(-2x-1)-(-1x3)-(3x-2)

4+1+9-2+3+6

23-2

21

Answer 2

Answer:

-2×2-2+22-2+3+6

-4-2+20+9

-6+29

23