Question

simplify:--
(x + y-2z)² - x² - y² - 3z² + 4xy​

Answer 1

Answer:

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Step-by-step explanation:

6 xy − 4 xz − 4 yz + $z^{2}$

Answer 2

Step-by-step explanation:

x² + y² - 4z² - x² - y²- 3z² + 4xy. = -7z²+4xy.

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