What two numbers multiply to -428 and add up to 103?

Here we answer the question: "What two numbers multiply to -428 and add up to 103?"

The answer to your question is:

-4 and 107

Below we illustrate and prove that -4 and 107 multiply to -428 and add up to 103:

-4 × 107 = -428
-4 + 107 = 103

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

x² + 103x - 428 = 0

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

(x - 4 ) (x + 107)

To summarize, since -4 and 107 multiply to -428 and add up 103, you know that the following is true:

x² + 103x - 428 = (x - 4 ) (x + 107)

Multiply To One Number and Add Up To Another
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