What two numbers multiply to -256 and add up to 126?

Here we answer the question: "What two numbers multiply to -256 and add up to 126?"

The answer to your question is:

-2 and 128

Below we illustrate and prove that -2 and 128 multiply to -256 and add up to 126:

-2 × 128 = -256
-2 + 128 = 126

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

x² + 126x - 256 = 0

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

(x - 2 ) (x + 128)

To summarize, since -2 and 128 multiply to -256 and add up 126, you know that the following is true:

x² + 126x - 256 = (x - 2 ) (x + 128)

Multiply To One Number and Add Up To Another
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