What two numbers multiply to 800 and add up to 402?

Here we answer the question: "What two numbers multiply to 800 and add up to 402?"

The answer to your question is:

2 and 400

Below we illustrate and prove that 2 and 400 multiply to 800 and add up to 402:

2 × 400 = 800
2 + 400 = 402

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

x² + 402x + 800 = 0

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

(x + 2 ) (x + 400)

To summarize, since 2 and 400 multiply to 800 and add up 402, you know that the following is true:

x² + 402x + 800 = (x + 2 ) (x + 400)

Multiply To One Number and Add Up To Another
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