What two numbers multiply to 645 and add up to 646?

Here we answer the question: "What two numbers multiply to 645 and add up to 646?"

The answer to your question is:

1 and 645

Below we illustrate and prove that 1 and 645 multiply to 645 and add up to 646:

1 × 645 = 645
1 + 645 = 646

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

x² + 646x + 645 = 0

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

(x + 1 ) (x + 645)

To summarize, since 1 and 645 multiply to 645 and add up 646, you know that the following is true:

x² + 646x + 645 = (x + 1 ) (x + 645)

Multiply To One Number and Add Up To Another
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