## College Algebra (10th Edition)

add; $25$
RECALL: To complete the square for the expression $x^2 +bx$, one must add $(\frac{b}{2})^2$. The given expression has $b=10$. Thus, to complete the square, add $(\frac{10}{2})^2=5^2=25$ to the given expression to have: $x^2+10x+25$ Therefore, the missing expressions in the given statement are (in order): add; $25$