What two numbers multiply to 810 and add up to 91?

Here we answer the question: "What two numbers multiply to 810 and add up to 91?"

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 91:

10 × 81 = 810
10 + 81 = 91

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

x² + 91x + 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 91, you know that the following is true:

x² + 91x + 810 = (x + 10 ) (x + 81)

Multiply To One Number and Add Up To Another
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