Question

x²+4y²+9z²-4xy-12yz+6xz​

Answer 1

Step-by-step explanation:

${x}^{2} + 4 {y}^{2} + 9 {z}^{2} - 4xy - 12yz + 6xz \\ = {x }^{2} + ( - 2y) {}^{2} + (3z) {}^{2} + 2(x)( - 2y) + 2( - 2y)(3z) + 2(x)(3z) \\ = (x - 2y + 3z) {}^{2} \: \: \: ans.$