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:

-28 and 30

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

-28 × 30 = -840
-28 + 30 = 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 - 28 ) (x + 30)

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

x² + 2x - 840 = (x - 28 ) (x + 30)

Multiply To One Number and Add Up To Another
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