Which equation represents a quadratic function with a leading coefficient of 2 and a constant term of negative 3 ?

A quadratic function has a highest power of x equal to 2. Its leading coefficient is the number multiplying x², and its constant term is the number without a variable. In 2x² + 3x − 3, the leading coefficient is 2 and the constant term is −3, so the correct choice is D.

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