SOLUTION: When the sum of 400 and three times a positive number is subtracted from the square of the number, the result is 150. Find the number.

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Question 831356: When the sum of 400 and three times a positive number is subtracted from the square of the number, the result is 150. Find the number.
Answer by JulietG(1812) About Me  (Show Source):
You can put this solution on YOUR website!
x^2 - (400 + 3x) = 150
x^2 - 400 - 3x = 150
x^2 - 3x = 550
x = 25