SOLUTION: The square of a positive number decreased by 4 times the number is 12. [only an algebraic soultion]

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Question 860663: The square of a positive number decreased by 4 times the number is 12. [only an algebraic soultion]
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

n^2 - 4n = 12

n^2 - 4n - 12 = 0  Factor

(n+2)(n-6) = 0  Using positive root only

       n = 6

CHECKING our answer***

  36 - 24 = 12

Wish You the Best in your Studies.