Question

Fatore:
ax + a + bx + b

Answer 1

x(a+b)+(a+b)=0
x(a+b)=-(a+b)
x=-(a+b)/(a+b)
x=-1

Answer 2

Fatore:

ax + a + bx + b

a(x + 1) + b(x + 1)

(x+1)(a+b)