What two numbers multiply to 520 and add up to 521?

Here we answer the question: "What two numbers multiply to 520 and add up to 521?"

The answer to your question is:

1 and 520

Below we illustrate and prove that 1 and 520 multiply to 520 and add up to 521:

1 × 520 = 520
1 + 520 = 521

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

x² + 521x + 520 = 0

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

(x + 1 ) (x + 520)

To summarize, since 1 and 520 multiply to 520 and add up 521, you know that the following is true:

x² + 521x + 520 = (x + 1 ) (x + 520)

Multiply To One Number and Add Up To Another
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