What two numbers multiply to 646 and add up to 55?

Here we answer the question: "What two numbers multiply to 646 and add up to 55?"

The answer to your question is:

17 and 38

Below we illustrate and prove that 17 and 38 multiply to 646 and add up to 55:

17 × 38 = 646
17 + 38 = 55

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

x² + 55x + 646 = 0

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

(x + 17 ) (x + 38)

To summarize, since 17 and 38 multiply to 646 and add up 55, you know that the following is true:

x² + 55x + 646 = (x + 17 ) (x + 38)

Multiply To One Number and Add Up To Another
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