What two numbers multiply to -840 and add up to -2?

Here we answer the question: "What two numbers multiply to -840 and add up to -2?"

The answer to your question is:

-30 and 28

Below we illustrate and prove that -30 and 28 multiply to -840 and add up to -2:

-30 × 28 = -840
-30 + 28 = -2

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

x² - 2x - 840 = 0

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

(x - 30 ) (x + 28)

To summarize, since -30 and 28 multiply to -840 and add up -2, you know that the following is true:

x² - 2x - 840 = (x - 30 ) (x + 28)

Multiply To One Number and Add Up To Another
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