which is the same thing as , you have to use FOIL by splitting the square into 2 binomials. FOIL is the order of what terms to multiply when multiplying 2 binomials.
First - Multiply the first terms ( and )
Outer - Multiply the outer terms ( and )
Inner - Multiply the inner terms ( and )
Last - Multiply the last terms ( and )
Do not ask for help in Live Chat. Live Chat (as it clearly states) is for small talk. (Against my better judgement I have edited an answer into your chat).
Your question here makes no sense - it requires more information.