What two numbers multiply to -660 and add up to 659?

Here we answer the question: "What two numbers multiply to -660 and add up to 659?"

The answer to your question is:

-1 and 660

Below we illustrate and prove that -1 and 660 multiply to -660 and add up to 659:

-1 × 660 = -660
-1 + 660 = 659

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

x² + 659x - 660 = 0

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

(x - 1 ) (x + 660)

To summarize, since -1 and 660 multiply to -660 and add up 659, you know that the following is true:

x² + 659x - 660 = (x - 1 ) (x + 660)

Multiply To One Number and Add Up To Another
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