What two numbers multiply to -878 and add up to 877?

Here we answer the question: "What two numbers multiply to -878 and add up to 877?"

The answer to your question is:

-1 and 878

Below we illustrate and prove that -1 and 878 multiply to -878 and add up to 877:

-1 × 878 = -878
-1 + 878 = 877

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

x² + 877x - 878 = 0

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

(x - 1 ) (x + 878)

To summarize, since -1 and 878 multiply to -878 and add up 877, you know that the following is true:

x² + 877x - 878 = (x - 1 ) (x + 878)

Multiply To One Number and Add Up To Another
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