What two numbers multiply to -687 and add up to -686?

Here we answer the question: "What two numbers multiply to -687 and add up to -686?"

The answer to your question is:

-687 and 1

Below we illustrate and prove that -687 and 1 multiply to -687 and add up to -686:

-687 × 1 = -687
-687 + 1 = -686

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

x² - 686x - 687 = 0

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

(x - 687 ) (x + 1)

To summarize, since -687 and 1 multiply to -687 and add up -686, you know that the following is true:

x² - 686x - 687 = (x - 687 ) (x + 1)

Multiply To One Number and Add Up To Another
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