Here we answer the question: "What two numbers multiply to 72 and add up to 17?"
The answer to your question is:
8 and 9
Below we illustrate and prove that 8 and 9 multiply to 72 and add up to 17:
8 × 9 = 72
8 + 9 = 17
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 + 17x + 72 = 0
If so, the solution to factor the quadratic equation above is:
(x + 8 ) (x + 9)
To summarize, since 8 and 9 multiply to 72 and add up 17, you know that the following is true:
x2 + 17x + 72 = (x + 8 ) (x + 9)
Multiply To One Number and Add Up To Another
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