Here we answer the question: "What two numbers multiply to 630 and add up to -57?"
The answer to your question is:
-42 and -15
Below we illustrate and prove that -42 and -15 multiply to 630 and add up to -57:
-42 × -15 = 630
-42 + -15 = -57
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 - 57x + 630 = 0
If so, the solution to factor the quadratic equation above is:
(x - 42 ) (x - 15)
To summarize, since -42 and -15 multiply to 630 and add up -57, you know that the following is true:
x2 - 57x + 630 = (x - 42 ) (x - 15)
Multiply To One Number and Add Up To Another
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