What two numbers multiply to -660 and add up to 161?

Here we answer the question: "What two numbers multiply to -660 and add up to 161?"

The answer to your question is:

-4 and 165

Below we illustrate and prove that -4 and 165 multiply to -660 and add up to 161:

-4 × 165 = -660
-4 + 165 = 161

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

x² + 161x - 660 = 0

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

(x - 4 ) (x + 165)

To summarize, since -4 and 165 multiply to -660 and add up 161, you know that the following is true:

x² + 161x - 660 = (x - 4 ) (x + 165)

Multiply To One Number and Add Up To Another
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