if the square of a positve integer is added to 2 times the integer, the result is 120

jujubeez Posts: 1, Reputation: 1

New Member

Dec 9, 2011, 06:35 PM

if the square of a positve integer is added to 2 times the integer, the result is 120

find the integer

corrigan Posts: 115, Reputation: 18

Junior Member

Dec 9, 2011, 08:54 PM

$x^2+2x=120 \Rightarrow x^2 +2x -120 = 0$ , then factor and solve for x. your answer is the positive one.

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