2.
(x+y)(a+2b)
(x-y)(7-3c)
(a+2)(m²+1)
(a-5)(p+1)
(6-m)(1+p)
(x-y)(t+p+3)
3.
b(a+2)+3(a+2)=(a+2)(b+3)
6m(4m+p)-n(4m+p)=(4m+p)(6m-n)
4.
x(x-3)=0
x=0
x=3
(y+1)(6y+1)=0
y=-1
y=-1/6
t²(t+1)+4(t+1)=0
(t+1)(t²+4)=0
t=-1
5.
5(a-b)+ab(b-a)=5(a-b)-ab(a-b)=(5-ab)(a-b)
6.
x²-6x+8=x²-4x-2x+8=x(x-2)-4(x-2)=(x-2)(x-4)