What two numbers multiply to -810 and add up to 129?

Here we answer the question: "What two numbers multiply to -810 and add up to 129?"

The answer to your question is:

-6 and 135

Below we illustrate and prove that -6 and 135 multiply to -810 and add up to 129:

-6 × 135 = -810
-6 + 135 = 129

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

x² + 129x - 810 = 0

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

(x - 6 ) (x + 135)

To summarize, since -6 and 135 multiply to -810 and add up 129, you know that the following is true:

x² + 129x - 810 = (x - 6 ) (x + 135)

Multiply To One Number and Add Up To Another
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