What two numbers multiply to -840 and add up to -839?

Here we answer the question: "What two numbers multiply to -840 and add up to -839?"

The answer to your question is:

-840 and 1

Below we illustrate and prove that -840 and 1 multiply to -840 and add up to -839:

-840 × 1 = -840
-840 + 1 = -839

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

x² - 839x - 840 = 0

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

(x - 840 ) (x + 1)

To summarize, since -840 and 1 multiply to -840 and add up -839, you know that the following is true:

x² - 839x - 840 = (x - 840 ) (x + 1)

Multiply To One Number and Add Up To Another
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