What two numbers multiply to -801 and add up to 80?

Here we answer the question: "What two numbers multiply to -801 and add up to 80?"

The answer to your question is:

-9 and 89

Below we illustrate and prove that -9 and 89 multiply to -801 and add up to 80:

-9 × 89 = -801
-9 + 89 = 80

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

x² + 80x - 801 = 0

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

(x - 9 ) (x + 89)

To summarize, since -9 and 89 multiply to -801 and add up 80, you know that the following is true:

x² + 80x - 801 = (x - 9 ) (x + 89)

Multiply To One Number and Add Up To Another
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