What two numbers multiply to -781 and add up to 780?

Here we answer the question: "What two numbers multiply to -781 and add up to 780?"

The answer to your question is:

-1 and 781

Below we illustrate and prove that -1 and 781 multiply to -781 and add up to 780:

-1 × 781 = -781
-1 + 781 = 780

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

x² + 780x - 781 = 0

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

(x - 1 ) (x + 781)

To summarize, since -1 and 781 multiply to -781 and add up 780, you know that the following is true:

x² + 780x - 781 = (x - 1 ) (x + 781)

Multiply To One Number and Add Up To Another
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