What two numbers multiply to 687 and add up to -688?

Here we answer the question: "What two numbers multiply to 687 and add up to -688?"

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 -688:

-687 × -1 = 687
-687 + -1 = -688

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

x² - 688x + 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 -688, you know that the following is true:

x² - 688x + 687 = (x - 687 ) (x - 1)

Multiply To One Number and Add Up To Another
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