SOLUTION: When the sum of 630 and four times a positive number is subtracted from the square of the number, the result is 150. Find the number.
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Question 707342: When the sum of 630 and four times a positive number is subtracted from the square of the number, the result is 150. Find the number.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
When the sum of 630 and four times a positive number is subtracted from the square of the number, the result is 150. Find the number.
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Let the number be "x":
Equation:
x^2-(630 + 4x) = 150
x^2 -4x -780 = 0
(x+26)(x-30) = 0
Positive solution:
x = 30
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Cheers,
Stan H.
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