Here we answer the question: "What two numbers multiply to 800 and add up to -165?"
The answer to your question is:
-160 and -5
Below we illustrate and prove that -160 and -5 multiply to 800 and add up to -165:
-160 × -5 = 800
-160 + -5 = -165
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 - 165x + 800 = 0
If so, the solution to factor the quadratic equation above is:
(x - 160 ) (x - 5)
To summarize, since -160 and -5 multiply to 800 and add up -165, you know that the following is true:
x2 - 165x + 800 = (x - 160 ) (x - 5)
Multiply To One Number and Add Up To Another
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