Answer: C: 27 just took the test..
Step-by-step explanation:
Answer:


Where 
And replacing we got:

And solving we got:

Where 
And the possible solutions are:

Step-by-step explanation:
For this case we use the equation given by the image and we have:

We can rewrite the last expression like this if we multiply both sides of the equation by -1.

Now we can use the quadratic formula given by:

Where 
And replacing we got:

And solving we got:

Where 
And the possible solutions are:
