Question

2x^2+y^2+8z^2-2√2xy-4√2yz+8xz=

Answer 1

Hey friend
You know the formula
( a + b + C ) ^2 = ( a^2 + b^2 + C ^2 + 2ab + 2bc + 2 ac )
Now compare your equation to this formula
{(√2)(x)}^2 + {y}^2 + {(2√2)(z)}^2 + 2(√2)(x)(y) + 2(y)(2√2)(z) + 2(2√2)(z)(√2)(x)
= { (√2)x + y + (2√2) z } ^2

Hope it will help you !!