What two numbers multiply to 644 and add up to -165?

Here we answer the question: "What two numbers multiply to 644 and add up to -165?"

The answer to your question is:

-161 and -4

Below we illustrate and prove that -161 and -4 multiply to 644 and add up to -165:

-161 × -4 = 644
-161 + -4 = -165

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

x² - 165x + 644 = 0

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

(x - 161 ) (x - 4)

To summarize, since -161 and -4 multiply to 644 and add up -165, you know that the following is true:

x² - 165x + 644 = (x - 161 ) (x - 4)

Multiply To One Number and Add Up To Another
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