What two numbers multiply to 665 and add up to 666?

Here we answer the question: "What two numbers multiply to 665 and add up to 666?"

The answer to your question is:

1 and 665

Below we illustrate and prove that 1 and 665 multiply to 665 and add up to 666:

1 × 665 = 665
1 + 665 = 666

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

x² + 666x + 665 = 0

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

(x + 1 ) (x + 665)

To summarize, since 1 and 665 multiply to 665 and add up 666, you know that the following is true:

x² + 666x + 665 = (x + 1 ) (x + 665)

Multiply To One Number and Add Up To Another
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