How do you factor x^2 + 4y^2 + 9z^2 +4xy -6xz -12yz?

Question

How do you factor this? step by step

Answer 1

x^2 + 4y^2 +9z^2 + 4xy - 6xz - 12yz

=>x^2 + (2y)^2 + (-3z)^2

.:here (x+2y-3z)^2  is expanded to get the result .

(x+2y-3z)(x+2y-3z) are the factors.

Answer 2

Use the formula (a+b+c)^2 = .....................

   So.. It yields ..

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