What two numbers multiply to -640 and add up to -156?

Here we answer the question: "What two numbers multiply to -640 and add up to -156?"

The answer to your question is:

-160 and 4

Below we illustrate and prove that -160 and 4 multiply to -640 and add up to -156:

-160 × 4 = -640
-160 + 4 = -156

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

x² - 156x - 640 = 0

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

(x - 160 ) (x + 4)

To summarize, since -160 and 4 multiply to -640 and add up -156, you know that the following is true:

x² - 156x - 640 = (x - 160 ) (x + 4)

Multiply To One Number and Add Up To Another
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