Question

factories it guys☺☺☺☺

Answer 1

$= 3 - 5a - 5b - 12( {a}^{2} + 2ab + {b}^{2} ) \\ = 3 - 5a - 5b - 12 {a}^{2} - 24ab - 12 {b}^{2}$
Here is the answer for your question. I hope it will help you.