What number must be added to the expression below to complete the square x^2+x

The american colonies would have been ruled by a king.

Iwould say 48 bc the line of x is the line of 6 so 6×6=48

So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho