To identify the coefficients in the quadratic expression \( 7x^2 - 4x + 12 \), we can express it in the standard form of a quadratic equation, which is \( ax^2 + bx + c \).
In the expression \( 7x^2 - 4x + 12 \):
- The coefficient \( a \) of \( x^2 \) is \( 7 \).
- The coefficient \( b \) of \( x \) is \( -4 \).
- The constant term \( c \) is \( 12 \).
Thus, the list of coefficients \( (a, b, c) \) for the expression \( 7x^2 - 4x + 12 \) is:
(7, -4, 12).