What two numbers multiply to 840 and add up to 422?

Here we answer the question: "What two numbers multiply to 840 and add up to 422?"

The answer to your question is:

2 and 420

Below we illustrate and prove that 2 and 420 multiply to 840 and add up to 422:

2 × 420 = 840
2 + 420 = 422

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

x² + 422x + 840 = 0

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

(x + 2 ) (x + 420)

To summarize, since 2 and 420 multiply to 840 and add up 422, you know that the following is true:

x² + 422x + 840 = (x + 2 ) (x + 420)

Multiply To One Number and Add Up To Another
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