What two numbers multiply to -870 and add up to 869?

Here we answer the question: "What two numbers multiply to -870 and add up to 869?"

The answer to your question is:

-1 and 870

Below we illustrate and prove that -1 and 870 multiply to -870 and add up to 869:

-1 × 870 = -870
-1 + 870 = 869

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

x² + 869x - 870 = 0

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

(x - 1 ) (x + 870)

To summarize, since -1 and 870 multiply to -870 and add up 869, you know that the following is true:

x² + 869x - 870 = (x - 1 ) (x + 870)

Multiply To One Number and Add Up To Another
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