What two numbers multiply to 641 and add up to 642?

Here we answer the question: "What two numbers multiply to 641 and add up to 642?"

The answer to your question is:

1 and 641

Below we illustrate and prove that 1 and 641 multiply to 641 and add up to 642:

1 × 641 = 641
1 + 641 = 642

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

x² + 642x + 641 = 0

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

(x + 1 ) (x + 641)

To summarize, since 1 and 641 multiply to 641 and add up 642, you know that the following is true:

x² + 642x + 641 = (x + 1 ) (x + 641)

Multiply To One Number and Add Up To Another
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