Question

Can please factorise this for me-9(x-2y)^2-4(x-2y)-13

Answer 1

$- 9(x - 2y)^{2} - 4(x - 2y) - 13 \\ \\ - 9( {x}^{2} - 4xy + 4y^{2}) - 4x + 8y - 13 \\ \\ { - 9x}^{2} + 36xy - {36y}^{2} - 9x + 8y - 13$