Question

9. Evaluate the following at x =-1, y= -2, z=0 (iii) (x+y+z) (x+y-z) -x²y-y²z+xz²-4xy



please give me correct answer

This question answer positive 3

please give me correct answer and explain ​

Answer 1

Answer:

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Answer 2

refer to the attachment for answer. the substitution is easy. pls mark as brainliest