Here we answer the question: "What two numbers multiply to -790 and add up to -393?"
The answer to your question is:
-395 and 2
Below we illustrate and prove that -395 and 2 multiply to -790 and add up to -393:
-395 × 2 = -790
-395 + 2 = -393
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 - 393x - 790 = 0
If so, the solution to factor the quadratic equation above is:
(x - 395 ) (x + 2)
To summarize, since -395 and 2 multiply to -790 and add up -393, you know that the following is true:
x2 - 393x - 790 = (x - 395 ) (x + 2)
Multiply To One Number and Add Up To Another
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