For this case we have the following polynomial:

The first thing to do is to place the variables on the same side of the equation.
We have then:

We complete the square by adding the term (b / 2) ^ 2 on both sides of the equation.
We have then:

Rewriting we have:

Therefore, the solutions are:
Answer:
the solution set of the equation is:
Answer: 60%
Step-by-step explanation: 24/40 = .6 x 100 = 60
Answer:
The size of Isabella's pool is 220 liters.
Step-by-step explanation:
Let the size of Isabella's pool be
liters,
be the rate of fill,
be the time of fill and
be the volume of water filled in the pool.
As the rate of fill is constant,
Therefore, volume of water filled in the pool can be given as,

Volume of water left is given as 
From the table,
Volume of water left after
minutes is 184 liters.
So,
-------- 1
Volume of water left after
minutes is 4 liters.
So,
------------2
Multiply equation 1 by 6 and equation 2 by -1, we get

Now, we add the above equations, we get

Therefore, the size of Isabella's pool is 220 liters.