What two numbers multiply to -810 and add up to 71?

Here we answer the question: "What two numbers multiply to -810 and add up to 71?"

The answer to your question is:

-10 and 81

Below we illustrate and prove that -10 and 81 multiply to -810 and add up to 71:

-10 × 81 = -810
-10 + 81 = 71

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

x² + 71x - 810 = 0

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

(x - 10 ) (x + 81)

To summarize, since -10 and 81 multiply to -810 and add up 71, you know that the following is true:

x² + 71x - 810 = (x - 10 ) (x + 81)

Multiply To One Number and Add Up To Another
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