Question

how do i factorise
1.)au-5b+ ab -5u
2.) 8bx - 15ay - 6by + 20ax
3.) 5pSquare - 8q +2p -20q

Answer 1

1)u(a-5)+b(-5+a);2). b(8x-6y)+a(15y+20x). 3). I have no idea for the third one....