Math

n-2n^2=0

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  1. n(1 - 2n) = 0
    n = 0 or 1 - 2n = 0

    n = 0 or n = 1/2

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    posted by Reiny
  2. How did you get 1 - 2n = 0?

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  3. I took out a common factor of n

    expand n(1-2n)
    What do you get ?

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    posted by Reiny
  4. Yes, but how did the first n in n(1 - 2n) go away?

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  5. It didn't, n = 0 became a solution.

    Are you not familiar that if you have a factored form = 0, such as
    (A)(B) = 0 , then
    A = 0 or B = 0 ???

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    posted by Reiny

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