Here we answer the question: "What two numbers multiply to 198 and add up to -31?"
The answer to your question is:
-22 and -9
Below we illustrate and prove that -22 and -9 multiply to 198 and add up to -31:
-22 × -9 = 198
-22 + -9 = -31
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 - 31x + 198 = 0
If so, the solution to factor the quadratic equation above is:
(x - 22 ) (x - 9)
To summarize, since -22 and -9 multiply to 198 and add up -31, you know that the following is true:
x2 - 31x + 198 = (x - 22 ) (x - 9)
Multiply To One Number and Add Up To Another
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