What two numbers multiply to -686 and add up to 685?

Here we answer the question: "What two numbers multiply to -686 and add up to 685?"

The answer to your question is:

-1 and 686

Below we illustrate and prove that -1 and 686 multiply to -686 and add up to 685:

-1 × 686 = -686
-1 + 686 = 685

Are you asking because you are trying to figure out how to factor the following quadratic equation?

x² + 685x - 686 = 0

If so, the solution to factor the quadratic equation above is:

(x - 1 ) (x + 686)

To summarize, since -1 and 686 multiply to -686 and add up 685, you know that the following is true:

x² + 685x - 686 = (x - 1 ) (x + 686)

Multiply To One Number and Add Up To Another
Did you find the information on this page useful? Here you can solve a similar problem.