What two numbers multiply to -640 and add up to -54?

Here we answer the question: "What two numbers multiply to -640 and add up to -54?"

The answer to your question is:

-64 and 10

Below we illustrate and prove that -64 and 10 multiply to -640 and add up to -54:

-64 × 10 = -640
-64 + 10 = -54

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

x² - 54x - 640 = 0

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

(x - 64 ) (x + 10)

To summarize, since -64 and 10 multiply to -640 and add up -54, you know that the following is true:

x² - 54x - 640 = (x - 64 ) (x + 10)

Multiply To One Number and Add Up To Another
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