What two numbers multiply to -390 and add up to 73?

Here we answer the question: "What two numbers multiply to -390 and add up to 73?"

The answer to your question is:

-5 and 78

Below we illustrate and prove that -5 and 78 multiply to -390 and add up to 73:

-5 × 78 = -390
-5 + 78 = 73

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

x² + 73x - 390 = 0

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

(x - 5 ) (x + 78)

To summarize, since -5 and 78 multiply to -390 and add up 73, you know that the following is true:

x² + 73x - 390 = (x - 5 ) (x + 78)

Multiply To One Number and Add Up To Another
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