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:

-7 and 92

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

-7 × 92 = -644
-7 + 92 = 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 - 7 ) (x + 92)

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

x² + 85x - 644 = (x - 7 ) (x + 92)

Multiply To One Number and Add Up To Another
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