Here we answer the question: "What two numbers multiply to -684 and add up to 17?"
The answer to your question is:
-19 and 36
Below we illustrate and prove that -19 and 36 multiply to -684 and add up to 17:
-19 × 36 = -684
-19 + 36 = 17
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 + 17x - 684 = 0
If so, the solution to factor the quadratic equation above is:
(x - 19 ) (x + 36)
To summarize, since -19 and 36 multiply to -684 and add up 17, you know that the following is true:
x2 + 17x - 684 = (x - 19 ) (x + 36)
Multiply To One Number and Add Up To Another
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