What two numbers multiply to 91 and add up to 20?

Here we answer the question: "What two numbers multiply to 91 and add up to 20?"

The answer to your question is:

7 and 13

Below we illustrate and prove that 7 and 13 multiply to 91 and add up to 20:

7 × 13 = 91
7 + 13 = 20

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

x² + 20x + 91 = 0

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

(x + 7 ) (x + 13)

To summarize, since 7 and 13 multiply to 91 and add up 20, you know that the following is true:

x² + 20x + 91 = (x + 7 ) (x + 13)

Multiply To One Number and Add Up To Another
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