Factor the polynomial by grouping
answer my report in math pls

1.) x^2-xy-4x+4y
2.) x^2-6x+xy-6y
3.)8x^2-4xy-6x+3y
4.)10m^2+25m-4m-10
5.)3ab-c+3ac-b

1) х(х-у)-4(х-у)=(х-у)(х-4)2)х(х-6)+у(х-6)=(х+у)(х-6)3)4х(2х-у)-3(2х-у)=(4х-3)(2х-у)4)5m(2m+5)-2(2m+5)=(5m-2)(2m+5)5)3a(b+c)-(b+c)=(3a-1)(b+c)