The calculated values of x are x = -99.35 and x = 519.35
How to determine for the value of x
From the question, we have the following parameters that can be used in our computation:
f(x) = 0.9x² - 378x
Also, we have
f(x) = 46438
Next, we plot the graphs of f(x)
Using the above as a guide, we have the following:
The graph is attached
Where, we have
x = -99.35 and x = 519.35
The graph of the function is attached
Question
Solve graphically
f(x) = 0.9x² - 378x
f(x) = 46438