Hi i am having difficulty in solving the following questions i would appreciate if you can provide me with the help of solving the following pleeeeese

The question are:

Factorise the following

1. a2 + 6x + 5

2. 3x2 - 2x -5

3. 10x2 + 19x + 7

4. 15a2 - 14a -8

Solve the following simultaneous equation

1. 5x +3y = 52 7x + 11y = 100

2. 15x -19y = 22 20x -23y = 34

i would appreciate all your help thank you