Here we answer the question: "What two numbers multiply to -840 and add up to 163?"
The answer to your question is:
-5 and 168
Below we illustrate and prove that -5 and 168 multiply to -840 and add up to 163:
-5 × 168 = -840
-5 + 168 = 163
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 + 163x - 840 = 0
If so, the solution to factor the quadratic equation above is:
(x - 5 ) (x + 168)
To summarize, since -5 and 168 multiply to -840 and add up 163, you know that the following is true:
x2 + 163x - 840 = (x - 5 ) (x + 168)
Multiply To One Number and Add Up To Another
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