What two numbers multiply to -408 and add up to 98?

Here we answer the question: "What two numbers multiply to -408 and add up to 98?"

The answer to your question is:

-4 and 102

Below we illustrate and prove that -4 and 102 multiply to -408 and add up to 98:

-4 × 102 = -408
-4 + 102 = 98

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

x² + 98x - 408 = 0

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

(x - 4 ) (x + 102)

To summarize, since -4 and 102 multiply to -408 and add up 98, you know that the following is true:

x² + 98x - 408 = (x - 4 ) (x + 102)

Multiply To One Number and Add Up To Another
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