What two numbers multiply to 640 and add up to 641?

Here we answer the question: "What two numbers multiply to 640 and add up to 641?"

The answer to your question is:

1 and 640

Below we illustrate and prove that 1 and 640 multiply to 640 and add up to 641:

1 × 640 = 640
1 + 640 = 641

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

x² + 641x + 640 = 0

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

(x + 1 ) (x + 640)

To summarize, since 1 and 640 multiply to 640 and add up 641, you know that the following is true:

x² + 641x + 640 = (x + 1 ) (x + 640)

Multiply To One Number and Add Up To Another
Did you find the information on this page useful? Here you can solve a similar problem.