Here we answer the question: "What two numbers multiply to 815 and add up to -168?"
The answer to your question is:
-163 and -5
Below we illustrate and prove that -163 and -5 multiply to 815 and add up to -168:
-163 × -5 = 815
-163 + -5 = -168
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 - 168x + 815 = 0
If so, the solution to factor the quadratic equation above is:
(x - 163 ) (x - 5)
To summarize, since -163 and -5 multiply to 815 and add up -168, you know that the following is true:
x2 - 168x + 815 = (x - 163 ) (x - 5)
Multiply To One Number and Add Up To Another
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