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

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

The answer to your question is:

-688 and 1

Below we illustrate and prove that -688 and 1 multiply to -688 and add up to -687:

-688 × 1 = -688
-688 + 1 = -687

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

x² - 687x - 688 = 0

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

(x - 688 ) (x + 1)

To summarize, since -688 and 1 multiply to -688 and add up -687, you know that the following is true:

x² - 687x - 688 = (x - 688 ) (x + 1)

Multiply To One Number and Add Up To Another
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