Here we answer the question: "What two numbers multiply to -65 and add up to -8?"
The answer to your question is:
-13 and 5
Below we illustrate and prove that -13 and 5 multiply to -65 and add up to -8:
-13 × 5 = -65
-13 + 5 = -8
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 - 8x - 65 = 0
If so, the solution to factor the quadratic equation above is:
(x - 13 ) (x + 5)
To summarize, since -13 and 5 multiply to -65 and add up -8, you know that the following is true:
x2 - 8x - 65 = (x - 13 ) (x + 5)
Multiply To One Number and Add Up To Another
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