What two numbers multiply to -512 and add up to 124?

Here we answer the question: "What two numbers multiply to -512 and add up to 124?"

The answer to your question is:

-4 and 128

Below we illustrate and prove that -4 and 128 multiply to -512 and add up to 124:

-4 × 128 = -512
-4 + 128 = 124

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

x² + 124x - 512 = 0

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

(x - 4 ) (x + 128)

To summarize, since -4 and 128 multiply to -512 and add up 124, you know that the following is true:

x² + 124x - 512 = (x - 4 ) (x + 128)

Multiply To One Number and Add Up To Another
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