What two numbers multiply to -624 and add up to 70?

Here we answer the question: "What two numbers multiply to -624 and add up to 70?"

The answer to your question is:

-8 and 78

Below we illustrate and prove that -8 and 78 multiply to -624 and add up to 70:

-8 × 78 = -624
-8 + 78 = 70

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

x² + 70x - 624 = 0

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

(x - 8 ) (x + 78)

To summarize, since -8 and 78 multiply to -624 and add up 70, you know that the following is true:

x² + 70x - 624 = (x - 8 ) (x + 78)

Multiply To One Number and Add Up To Another
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