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.

Algebra ->  Customizable Word Problem Solvers  -> Travel -> 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.       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

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) About Me  (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.
----------
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
========================
Cheers,
Stan H.
==================