Pls help soon!:)Question- 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.A. x2 + 3x ≥ 15 + xB. x2 - 3x + 7 ≥ 15xC. x2 - 3x - 21 > 15xD. x2 - 3x + 21 > 15 + x