text: how do i learn how to do foil in math? it has monomials and polynomials i also need help with my signs oh, it's fun.  =)  first outer inner  last  when multiplying two binomials,   (x+4) (x-2)  first x times x = x squared outer is x times -2 = -2x inner is x times 4 = 4x last is 4 times -2 = -8  combine like terms (which are your outer and inner) -2x + 4x = 2x  and write it out:  xsquared +2x-8  when adding integers, if the signs are the same:  add and keep the sign  if they are different, subtract and keep the sign of the number with the greater absolute value.  mult/div:  signs same = answer positive signs different = answer negative  good luck.