The product of two consecutive even integers is 168. What are the integers?
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Let the first even integer be , and because the even integers are consecutive, the second even integer is , and the product of the two even integers is .
Solving the quadratic equation by factorisation with -12 and 14 as the factors of -168 which add up to 2, we have .
or
or .
Therefore, the two even integers are 12 and 14 or -14 and -12.