Common Core Algebra I, Regents, test prep Get the Math and Points CC Alg I August 2016 #8 September 17, 2016 mathconfidence Leave a comment This is the difference of squares and must be factored with a + and – to get the -100. This eliminates answers (1) and (3) Notice that answer (4) has 25 x 25 which would be way too much! We can verify our answer by putting the info into the TI-84