What two numbers multiply to -644 and add up to -85?

Here we answer the question: "What two numbers multiply to -644 and add up to -85?"

The answer to your question is:

-92 and 7

Below we illustrate and prove that -92 and 7 multiply to -644 and add up to -85:

-92 × 7 = -644
-92 + 7 = -85

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

x² - 85x - 644 = 0

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

(x - 92 ) (x + 7)

To summarize, since -92 and 7 multiply to -644 and add up -85, you know that the following is true:

x² - 85x - 644 = (x - 92 ) (x + 7)

Multiply To One Number and Add Up To Another
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