When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
If a = 6 and z = -2, what is the value of -4a(a - z)?
| -20 | |
| 432 | |
| 28 | |
| -192 |