Разложите на множители

1) 5х-45=5(x-9)
2)3a-75b=3(a-25b)
3)5a+10ab+5b=(5 a+5 b)=(5 a+5 b)(5 a+5 b)
4)ax-2axy+ay=(a x-a y)=(a x-a y)(a x-a y)
5)x+2x+x=x(x+x+1)
6) 6a+12ab-6b=6(a+2ab-b)
7) 16x-81=(4x-9)(4x+9)
8) x-x-y-y=(x-y)(x+y)
9)x+2xy+y-m=(x+y)-m=(x+y-m)(x+y+m)
10) x-y=(x)-(y)=(x-y)(x+y)