Mathematics, 08.10.2019 20:30 jordan2875

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 + x

b.) x2 - 3x + 7 ≥ 15x

c.) x2 - 3x - 21 > 15x

d.) x2 - 3x + 21 > 15 + x

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