Question

9. Evaluate each of the following expressions for x = -2, y = -1, z = 3 :


x2 + y2 + z2 – xy – yz – zx

I'll mark the correct answer as the brainliest:)​

Answer 1

Answer:

7

Step-by-step explanation:

x2+y2+z2-xy-yz-zx

(-2)2 + (-1)2 + (3)2 - (-2)(-1) -(-1)(3) - (3)(-2)

-4 -2 +6 -2 +3 +6

-8+15

7

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