What two numbers multiply to -128 and add up to -127?

Here we answer the question: "What two numbers multiply to -128 and add up to -127?"

The answer to your question is:

-128 and 1

Below we illustrate and prove that -128 and 1 multiply to -128 and add up to -127:

-128 × 1 = -128
-128 + 1 = -127

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

x² - 127x - 128 = 0

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

(x - 128 ) (x + 1)

To summarize, since -128 and 1 multiply to -128 and add up -127, you know that the following is true:

x² - 127x - 128 = (x - 128 ) (x + 1)

Multiply To One Number and Add Up To Another
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