What two numbers multiply to 689 and add up to 690?

Here we answer the question: "What two numbers multiply to 689 and add up to 690?"

The answer to your question is:

1 and 689

Below we illustrate and prove that 1 and 689 multiply to 689 and add up to 690:

1 × 689 = 689
1 + 689 = 690

Are you asking because you are trying to figure out how to factor the following quadratic equation?

x² + 690x + 689 = 0

If so, the solution to factor the quadratic equation above is:

(x + 1 ) (x + 689)

To summarize, since 1 and 689 multiply to 689 and add up 690, you know that the following is true:

x² + 690x + 689 = (x + 1 ) (x + 689)

Multiply To One Number and Add Up To Another
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