Here we answer the question: "What two numbers multiply to -392 and add up to -14?"
The answer to your question is:
-28 and 14
Below we illustrate and prove that -28 and 14 multiply to -392 and add up to -14:
-28 × 14 = -392
-28 + 14 = -14
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 - 14x - 392 = 0
If so, the solution to factor the quadratic equation above is:
(x - 28 ) (x + 14)
To summarize, since -28 and 14 multiply to -392 and add up -14, you know that the following is true:
x2 - 14x - 392 = (x - 28 ) (x + 14)
Multiply To One Number and Add Up To Another
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