2x^2+y^2+8z^2-2√2xy+4√2yz-8zx
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Step-by-step explanation:
(-√2 x)^2+y^2 +(2√2 z)^2. -2√2xy+4√2yz-8zx
=(y-2√2 x+2√2z)^2
hope it helps :)
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