ANSWER
See attachment.
EXPLANATION
The given function is

When we compare this function to

We have a=1, b=4 and c=5
We put this inside the formula for the discriminant, which is



Since the discriminant is negative, the function has no x-intercepts.
The graph of this function is the one hanging in the air above the x-axis and opens upwards.
Answer:
12
Step-by-step explanation:
Let's simplify each term.



Now we multiply:

Hope this helps!
The greatest common factor is 36
A = L*W = 10 * 12 = 120 square feet.