Question

please help me only correct answer ​

Answer 1

Factorize : x² + 9y² + 4z² + 6xy - 12yz - 4xz

(x)² + (3y)² + (-2z)² + 2(x)(3y) + 2(3y)(-2z) +  2(x)(-2z)

Identity used here : (a+b+c)² = a² + b² + c² + 2ab + 2bc + 2ac

Hence,

x² + 9y² + 4z² + 6xy - 12yz - 4xz = {x+3y+(-2z)}{x+3y+(-2z)} = {x+3y+(-2z)}²

Hope it helps

have a great day