## Algebra 1: Common Core (15th Edition)

a. $12(t+2)(t-2)$ b. $3(2x+1)^{2}$
a. $12t^{2}-48=$ ...factor out the GCF, $12$. $=12(t^{2}-4)$ ...write the difference as $a^{2}-b^{2}$. $=12(t+2)(t-2)$ b. $12x^{2}+12x+3=$ ...factor out the GCF, $3$. $=3(4x^{2}+4x+1)$ ...write as the square of a binomial $=3(2x+1)^{2}$