Answer:
196
Step-by-step explanation:
On a separate piece of paper do these steps.
Divide - 28 by 2 which gives - 14
square - 14 giving you (-14)^2 = 196
Write that after the plus sign.
q^2 - 28q + 196
This gives a perfect square quadratic.
(q - 14)^2 when expanded gives q^2 - 28q + 196
