What two numbers multiply to -402 and add up to 401?

Here we answer the question: "What two numbers multiply to -402 and add up to 401?"

The answer to your question is:

-1 and 402

Below we illustrate and prove that -1 and 402 multiply to -402 and add up to 401:

-1 × 402 = -402
-1 + 402 = 401

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

x² + 401x - 402 = 0

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

(x - 1 ) (x + 402)

To summarize, since -1 and 402 multiply to -402 and add up 401, you know that the following is true:

x² + 401x - 402 = (x - 1 ) (x + 402)

Multiply To One Number and Add Up To Another
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