Factor x^2 + 4xy - 12y^2
\(\star\) \(x^2 + 4xy - 12y^2\) \(\star\) \(Factor \ with \ quadratic \ formula\) \(\star\) \(a=1, \ b=4y \ and \ c=-12y^2.\) \(\star\) \((x-2y)(x+6y)\)