What two numbers multiply to -840 and add up to 22?

Here we answer the question: "What two numbers multiply to -840 and add up to 22?"

The answer to your question is:

-20 and 42

Below we illustrate and prove that -20 and 42 multiply to -840 and add up to 22:

-20 × 42 = -840
-20 + 42 = 22

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

x² + 22x - 840 = 0

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

(x - 20 ) (x + 42)

To summarize, since -20 and 42 multiply to -840 and add up 22, you know that the following is true:

x² + 22x - 840 = (x - 20 ) (x + 42)

Multiply To One Number and Add Up To Another
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