Here we answer the question: "What two numbers multiply to 880 and add up to -91?"
The answer to your question is:
-80 and -11
Below we illustrate and prove that -80 and -11 multiply to 880 and add up to -91:
-80 × -11 = 880
-80 + -11 = -91
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 - 91x + 880 = 0
If so, the solution to factor the quadratic equation above is:
(x - 80 ) (x - 11)
To summarize, since -80 and -11 multiply to 880 and add up -91, you know that the following is true:
x2 - 91x + 880 = (x - 80 ) (x - 11)
Multiply To One Number and Add Up To Another
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