Here we answer the question: "What two numbers multiply to 720 and add up to -72?"
The answer to your question is:
-60 and -12
Below we illustrate and prove that -60 and -12 multiply to 720 and add up to -72:
-60 × -12 = 720
-60 + -12 = -72
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 - 72x + 720 = 0
If so, the solution to factor the quadratic equation above is:
(x - 60 ) (x - 12)
To summarize, since -60 and -12 multiply to 720 and add up -72, you know that the following is true:
x2 - 72x + 720 = (x - 60 ) (x - 12)
Multiply To One Number and Add Up To Another
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