What two numbers multiply to -840 and add up to -418?

Here we answer the question: "What two numbers multiply to -840 and add up to -418?"

The answer to your question is:

-420 and 2

Below we illustrate and prove that -420 and 2 multiply to -840 and add up to -418:

-420 × 2 = -840
-420 + 2 = -418

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

x² - 418x - 840 = 0

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

(x - 420 ) (x + 2)

To summarize, since -420 and 2 multiply to -840 and add up -418, you know that the following is true:

x² - 418x - 840 = (x - 420 ) (x + 2)

Multiply To One Number and Add Up To Another
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