Here we answer the question: "What two numbers multiply to -207 and add up to 206?"
The answer to your question is:
-1 and 207
Below we illustrate and prove that -1 and 207 multiply to -207 and add up to 206:
-1 × 207 = -207
-1 + 207 = 206
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 + 206x - 207 = 0
If so, the solution to factor the quadratic equation above is:
(x - 1 ) (x + 207)
To summarize, since -1 and 207 multiply to -207 and add up 206, you know that the following is true:
x2 + 206x - 207 = (x - 1 ) (x + 207)
Multiply To One Number and Add Up To Another
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