What two numbers multiply to 810 and add up to 407?

Here we answer the question: "What two numbers multiply to 810 and add up to 407?"

The answer to your question is:

2 and 405

Below we illustrate and prove that 2 and 405 multiply to 810 and add up to 407:

2 × 405 = 810
2 + 405 = 407

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

x² + 407x + 810 = 0

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

(x + 2 ) (x + 405)

To summarize, since 2 and 405 multiply to 810 and add up 407, you know that the following is true:

x² + 407x + 810 = (x + 2 ) (x + 405)

Multiply To One Number and Add Up To Another
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