can you please answer these questions simply and simple workings out pleeeeaseee and tell me the answer!

Answer show workings

1) Solve 5(x+1)=3x + 12

2)facotorise x(squared) + 5x + 4

3) rearrange the forumla to make x the subject y = b- ax(squared)

4) solve x(squared) + 5x + 4 = 0