# How do I use completing the square to describe the graph of #f(x)=30-12x-x^2#?

##### 1 Answer

Sep 1, 2015

To plot the graph, find

y-axis intercept:

x-axis intercept:

Since this is a quadratic equation there is one stationary point. In this case it is a maximum since the coefficient of highest order

So:

graph{30-12x-x^2 [-20, 10, -100, 100]}