The difference of the square of a number and three times the sum of the number and 7 is more than the product of that number and 15. Select the inequality that can be used to determine the unknown number.
The question stated that the difference of the square of a number and three times the sum of the number and 7 (x^2-3 (x+7))is more than the product of that number and 15 (15x)
