How do I multiply a polynomial by a binomial?
Distributive property.\(a(b+c)=ab+ac\)\((a+b)(c+d)=a(c+d)+b(c+d)=ac+ad+bc+ad\)\((a+b+c)(d+e)=a(d+e)+b(d+e)+c(d+e)=ad+ae+bd+be+cd+ce\)and so on.
