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The product of two consecutive positive even integers is 440. What are the integers? Show all work.
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Jan 10, 2019
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The product of two consecutive positive even integers is 440. What are the integers?
Show all work.
Mathematics
high-school
Farajnew
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if intergers are n and n+2 we have the equation
n(n + 2) = 440
n^2 + 2n - 440 = 0
(n - 20)(n + 22) = 0
n = 20 , -22 (ignore the -22 because the integers are positive)
So the integers are 20,22
Eric Arenson
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Jan 12, 2019
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If the average of the two integers is x, the product of the two integers is
(x-1)(x+1) = 440
x² - 1 = 440
x² = 441 = 21²
21 is the odd integer between the two even integers you seek.
The integers are 20 and 22.
SushiHangover
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Jan 16, 2019
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