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:

4 and 161

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

4 × 161 = 644
4 + 161 = 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 + 4 ) (x + 161)

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

x² + 165x + 644 = (x + 4 ) (x + 161)

Multiply To One Number and Add Up To Another
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