## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$(t+6)^{2}$
$12t+36+t^{2}\qquad$..recognize perfect-square trinomial. $36$ and $t^{2}$ are squares. $=t^{2}+2\cdot 6\cdot t+36\qquad$.. the sign of the middle term is positive. Write as $(A+B)^{2},\ A=t,\ B=6$ $=(t+6)^{2}$