Here we answer the question: "What two numbers multiply to -45 and add up to 12?"
The answer to your question is:
-3 and 15
Below we illustrate and prove that -3 and 15 multiply to -45 and add up to 12:
-3 × 15 = -45
-3 + 15 = 12
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 + 12x - 45 = 0
If so, the solution to factor the quadratic equation above is:
(x - 3 ) (x + 15)
To summarize, since -3 and 15 multiply to -45 and add up 12, you know that the following is true:
x2 + 12x - 45 = (x - 3 ) (x + 15)
Multiply To One Number and Add Up To Another
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