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I'm still confused because of the -2xy and -2yz. Is it possible to complete the square?Use the given hint allow with the property of associativity to write:
\(\displaystyle \left(x^2-2xy+y^2 \right)+\left(y^2-2yx+z^2 \right)=0\)
Now do you see how to proceed?
What is the expansion of $(a-b)^2$?I'm still confused because of the -2xy and -2yz. Is it possible to complete the square?