What two numbers multiply to 404 and add up to 405?

Here we answer the question: "What two numbers multiply to 404 and add up to 405?"

The answer to your question is:

1 and 404

Below we illustrate and prove that 1 and 404 multiply to 404 and add up to 405:

1 × 404 = 404
1 + 404 = 405

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

x² + 405x + 404 = 0

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

(x + 1 ) (x + 404)

To summarize, since 1 and 404 multiply to 404 and add up 405, you know that the following is true:

x² + 405x + 404 = (x + 1 ) (x + 404)

Multiply To One Number and Add Up To Another
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