What two numbers multiply to -680 and add up to -77?

Here we answer the question: "What two numbers multiply to -680 and add up to -77?"

The answer to your question is:

-85 and 8

Below we illustrate and prove that -85 and 8 multiply to -680 and add up to -77:

-85 × 8 = -680
-85 + 8 = -77

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

x² - 77x - 680 = 0

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

(x - 85 ) (x + 8)

To summarize, since -85 and 8 multiply to -680 and add up -77, you know that the following is true:

x² - 77x - 680 = (x - 85 ) (x + 8)

Multiply To One Number and Add Up To Another
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