What two numbers multiply to -840 and add up to 206?

Here we answer the question: "What two numbers multiply to -840 and add up to 206?"

The answer to your question is:

-4 and 210

Below we illustrate and prove that -4 and 210 multiply to -840 and add up to 206:

-4 × 210 = -840
-4 + 210 = 206

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

x² + 206x - 840 = 0

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

(x - 4 ) (x + 210)

To summarize, since -4 and 210 multiply to -840 and add up 206, you know that the following is true:

x² + 206x - 840 = (x - 4 ) (x + 210)

Multiply To One Number and Add Up To Another
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