Identify the correct list of coefficients for the quadratic expression: 3x^2 + 5x - 12

The coefficients of the quadratic expression \( 3x^2 + 5x - 12 \) can be identified as follows:

- The coefficient of \( x^2 \) (the quadratic term) is \( 3 \).
- The coefficient of \( x \) (the linear term) is \( 5 \).
- The constant term (the term without \( x \)) is \( -12 \).

Therefore, the list of coefficients is:

- \( a = 3 \) (for \( x^2 \))
- \( b = 5 \) (for \( x \))
- \( c = -12 \) (constant term)

So, the coefficients are \( (3, 5, -12) \).