(X+5)(X+1)
Use the FOIL method to expand.
This means multiply each term in the first set of parenthesis by each term in the second set.
x *x = x^2
x*1 = x
5*x = 5x
5*1 = 5
Now you have x^2 + x + 5x + 5
Now simplify by combining like terms:
x^2 + 6x + 5
