I think not sure but i think the discout is $5.76
Multiplied: <span>3/5a
Simplified: Also ^ 3/5a</span>
General vertex form:

Given :

Extract "spread factor" m

Complete the square


Write as a squared binomial and simplify the constant

Re-write to match signs of standard general form:

Answer:
0.6 books
Step-by-step explanation:
Divide 9 by 15 to get 0.6 books a month