can you show some workings too please that would be great
1) (q+4)(q+5) expand and simplify i got - q(squared)+9q+20
simplified 9q(cubed) + 20
2) expand and simplify (2k - 3m)(3k+2m) help?
3) Solve 5(x+1)=3x + 12
4)facotorise x(squared) + 5x + 4
5) rearrange the forumla to make x the subject y = b- ax(squared)
5) solve x(squared) + 5x + 4 = 0