factorise 2x^2 + y^2 + 8z^2 - 2root2 xy + 4root2 yz - 8xz
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2x^2+y^2+8z^2-2root2xy+4root2yz-8xz
=(y-root2x+2root2z)^2
=(y-root2x+2root2z)(y-root2x+2root2z)
srinikaetan:
thanks
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