Here we answer the question: "What two numbers multiply to -630 and add up to -207?"
The answer to your question is:
-210 and 3
Below we illustrate and prove that -210 and 3 multiply to -630 and add up to -207:
-210 × 3 = -630
-210 + 3 = -207
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 - 207x - 630 = 0
If so, the solution to factor the quadratic equation above is:
(x - 210 ) (x + 3)
To summarize, since -210 and 3 multiply to -630 and add up -207, you know that the following is true:
x2 - 207x - 630 = (x - 210 ) (x + 3)
Multiply To One Number and Add Up To Another
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