What two numbers multiply to -686 and add up to 91?

Here we answer the question: "What two numbers multiply to -686 and add up to 91?"

The answer to your question is:

-7 and 98

Below we illustrate and prove that -7 and 98 multiply to -686 and add up to 91:

-7 × 98 = -686
-7 + 98 = 91

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

x² + 91x - 686 = 0

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

(x - 7 ) (x + 98)

To summarize, since -7 and 98 multiply to -686 and add up 91, you know that the following is true:

x² + 91x - 686 = (x - 7 ) (x + 98)

Multiply To One Number and Add Up To Another
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