Here we answer the question: "What two numbers multiply to -425 and add up to -80?"
The answer to your question is:
-85 and 5
Below we illustrate and prove that -85 and 5 multiply to -425 and add up to -80:
-85 × 5 = -425
-85 + 5 = -80
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 - 80x - 425 = 0
If so, the solution to factor the quadratic equation above is:
(x - 85 ) (x + 5)
To summarize, since -85 and 5 multiply to -425 and add up -80, you know that the following is true:
x2 - 80x - 425 = (x - 85 ) (x + 5)
Multiply To One Number and Add Up To Another
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