What two numbers multiply to 646 and add up to 647?

Here we answer the question: "What two numbers multiply to 646 and add up to 647?"

The answer to your question is:

1 and 646

Below we illustrate and prove that 1 and 646 multiply to 646 and add up to 647:

1 × 646 = 646
1 + 646 = 647

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

x² + 647x + 646 = 0

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

(x + 1 ) (x + 646)

To summarize, since 1 and 646 multiply to 646 and add up 647, you know that the following is true:

x² + 647x + 646 = (x + 1 ) (x + 646)

Multiply To One Number and Add Up To Another
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