What two numbers multiply to 647 and add up to 648?

Here we answer the question: "What two numbers multiply to 647 and add up to 648?"

The answer to your question is:

1 and 647

Below we illustrate and prove that 1 and 647 multiply to 647 and add up to 648:

1 × 647 = 647
1 + 647 = 648

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

x² + 648x + 647 = 0

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

(x + 1 ) (x + 647)

To summarize, since 1 and 647 multiply to 647 and add up 648, you know that the following is true:

x² + 648x + 647 = (x + 1 ) (x + 647)

Multiply To One Number and Add Up To Another
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