How do you solve the equation -x^2-7x=0 by graphing?

1 Answer
Alan P.
Mar 30, 2017

x=0 or x=-7
color(white)("XXXXXXX")see below for solution by graphing.

Explanation:

If you have graphing software (or a graphing calculator) you should be able to generate the graph for f(x)=-x^2-7x.
Here is what it looks line with Socratic's Graph utility:
graph{-x^2-7x [-16.02, 12.45, -1.78, 12.44]}
You can see that the graph crosses the X-axis (that is -x^2-7x=0) at x=0 and x=-7.

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