Here we answer the question: "What two numbers multiply to -866 and add up to 431?"
The answer to your question is:
-2 and 433
Below we illustrate and prove that -2 and 433 multiply to -866 and add up to 431:
-2 × 433 = -866
-2 + 433 = 431
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 + 431x - 866 = 0
If so, the solution to factor the quadratic equation above is:
(x - 2 ) (x + 433)
To summarize, since -2 and 433 multiply to -866 and add up 431, you know that the following is true:
x2 + 431x - 866 = (x - 2 ) (x + 433)
Multiply To One Number and Add Up To Another
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