Hi, new to the forum and need some help on Factorisation!!

I really need help on the following equations (It must be solved using factorisation) :

A) solve the following equations using factorisation:

1) x^2 - 4x - 4 = 0
2) 6x^2 - 5x - 4 = 0
3) 8x^2 + 2x - 15 = 0

B) solve the following equations using the formula method:

1) 3x^2 - 11x - 4 = 0
2) 4x^2 + 7x + 2 = 0
3) 2x^2 + 5x - 4 = 0

I'd be extremely grateful if you can tell me how to do these, thank you