Question

1-4h^2-12hk-9k^2 factorisation

please help thank you

Answer 1

1-4h^2-12hk-9k^2
-(4h^2+12hk-(1-9k^2))
-(4h^2+12hk-(1^2-(3k)^2))
-(4h^2+12hk-(1+3k)(1-3k))
-4h^2-12hk+(1+3k)(1-3k)