What two numbers multiply to -420 and add up to 208?

Here we answer the question: "What two numbers multiply to -420 and add up to 208?"

The answer to your question is:

-2 and 210

Below we illustrate and prove that -2 and 210 multiply to -420 and add up to 208:

-2 × 210 = -420
-2 + 210 = 208

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

x² + 208x - 420 = 0

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

(x - 2 ) (x + 210)

To summarize, since -2 and 210 multiply to -420 and add up 208, you know that the following is true:

x² + 208x - 420 = (x - 2 ) (x + 210)

Multiply To One Number and Add Up To Another
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